Sweetheart Formal Gowns and Party Dresses

The PromGirl formal dress collection features both short prom and party dresses and long formal evening gowns with sweetheart necklines. This style of dress features a neckline with two curved edges resembling the shape of a heart. The curve can be sweet and alluring with a small opening or daring and sexy in a low cut style. You will find here halter top dresses, elegant long prom dresses, sweet sixteen party dresses, or sparkling cocktail dresses and little black dresses for the holidays all with sweetheart neckline that are feminine and chic. Theses are dresses you'll want to wear again and again and are sure to become a favorite in any girl's closet. 

In Stock Buy Short Sleeveless Dress at PromGirl
  • Royal Blue

Short Sleeveless Dress

$29.00 $14.00 CCC-6C9295
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Black/Black/Nude

Short Strapless Sweetheart Dress

$39.00 $19.00 EM-BFB-1027-028
In Stock Buy Short Strapless Lace Summer Dress at PromGirl
  • Peach

Short Strapless Lace Dress

$29.00 $19.00 TR-D30160
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Navy

Short Strapless Sweetheart Dress by Ruby Rox

$59.00 $29.00 RR-FPS12241i4-465
In Stock Buy Short Fitted Strapless Dress at PromGirl
  • Black/Gold

Short Fitted Strapless Dress

$59.00 $29.00 WC-K1744
In Stock Buy Short Lace Spaghetti Strap Dress at PromGirl
  • Black/Nude

Short Lace Spaghetti Strap Dress

$78.00 $29.00 MT-7109
In Stock Buy Short White Strapless Sweetheart at PromGirl
  • Black

Short White Strapless Dress

$79.00 $29.00 MT-MD-3727
In Stock Buy Short Sleeveless Sweetheart Dress at PromGirl
  • Navy
  • Royal
  • Neon Coral

Short Sleeveless Sweetheart Dress

$49.00 $29.00 EM-DUB-1061-v
In Stock Buy Strapless Ruched Pink Party Dress at PromGirl
  • Pink
  • Light Teal
  • Champagne
  • Red

Strapless Ruched Party Dress

$69.00 $34.00 DI-JM1363
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Ivory
  • Turquoise

Short Strapless Sweetheart Dress

$69.00 $34.00 NA-2820
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Cream

Short Strapless Sweetheart Dress

$69.00 $34.00 MT-MD-5661
In Stock Buy Strapless Ruched Pink Party Dress at PromGirl
  • Pink
  • Light Teal
  • Champagne
  • Red

Strapless Ruched Pink Party Dress

$69.00 $34.00 DI-JM1363p
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Royal/Black

Short Strapless Sweetheart Dress

$69.00 $34.00 MQ-700985
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Black/Fuchsia

Short Strapless Sweetheart Dress

$69.00 $39.00 WC-K1751
In Stock Buy Floor Length Sleeveless Lace Dress at PromGirl
  • Black

Floor Length Sleeveless Lace Dress

$79.00 $39.00 LP-22890
In Stock Buy Short Strapless Sweetheart Sequin Dress at PromGirl
  • Navy/Silver

Short Strapless Sweetheart Sequin Dress

$79.00 $39.00 RR-GNN12458I
In Stock Buy High Low Strapless Sweetheart Dress at PromGirl
  • Navy/Silver

High Low Strapless Sweetheart Dress

$79.00 $39.00 RR-GPJ12458I
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Mint
  • New Red
  • Peach
  • New Teal

Beaded Strapless Short Dress

$99.00 $39.00 DI-JM2597
In Stock Buy High Low Strapless Sweetheart Dress at PromGirl
  • Aqua
  • Baby Pink

High Low Strapless Sweetheart Dress

$90.00 $45.00 NA-2699n
In Stock Buy Strapless Lace Mermaid Dress at PromGirl
  • Black
  • Fuchsia
  • Champagne
  • Royal
  • New Red
  • Navy

Strapless Lace Mermaid Dress

$99.00 $49.00 DI-13524L
In Stock Buy High Low Sparkling Strapless Dress at PromGirl
  • Navy

High Low Sparkling Strapless Dress

$99.00 $49.00 MY-6103gj1n
In Stock Buy Floor Length Strapless Sweetheart Dress at PromGirl
  • Deep Blue Ocean

Long Strapless Blue Dress for Prom

$99.00 $49.00 CT-8420NN3E
In Stock Buy Floor Length Open Back Lace Gown at PromGirl
  • Coral

Floor Length Open Back Lace Gown

$149.00 $49.00 JU-47705
In Stock Buy High Low Strapless Dress at PromGirl
  • Purple/Crystal

High Low Strapless Dress by Bee Darlin

$99.00 $49.00 BD-Q0154958
In Stock Buy Short Strapless Sweetheart Zebra Print Dress at PromGirl
  • Zebra/Purple

Short Zebra Print Party Dress

$99.00 $49.00 DQ-8103
In Stock Buy Short Strapless Sweetheart Babydoll Dress at PromGirl
  • Fuchsia/Pink
  • Turquoise/Olive
  • Olive/Pink
  • Silver

Strapless Baby Doll Party Dress

$99.00 $49.00 DQ-8000-v
In Stock Buy Short Strapless Sweetheart Pink Dress at PromGirl
  • Pink

Short Strapless White Dress

$90.00 $49.00 MT-MD-5533-vp
In Stock Buy Classic Long Strapless Sweetheart Gown at PromGirl
  • Plum
  • Royal

Classic Long Strapless Gown

$99.00 $50.00 PO-5986
In Stock Buy Short Ruched Spaghetti Strap Dress at PromGirl
  • Fuchsia
  • Yellow

Short Ruched Spaghetti Strap Dress

$109.00 $54.00 PO-6542
In Stock Buy Short Sleeveless Little Black Dress at PromGirl
  • Black

Short Sleeveless Little Black Dress

$109.00 $54.00 WC-K2887
In Stock Buy Short One Shoulder Tulle Dress at PromGirl
  • Turquoise
  • Fuchsia

One Shoulder Party Dress

$149.00 $59.00 DQ-8030
In Stock Buy Strapless Sweetheart Floor Length Dress at PromGirl
  • Lilac

Strapless Sweetheart Floor Length Dress

$99.00 $59.00 MY-8341GG1S
In Stock Buy Long One Shoulder Ruched Dress at PromGirl
  • Royal
  • Black
  • Eggplant
  • Red
  • Light Teal
  • Pink
  • Green

Elegant One Shoulder Gown for Prom

$99.00 $59.00 DI-15218
In Stock Buy Floor Length Strapless Sweetheart Dress at PromGirl
  • Coral

Floor Length Strapless Sweetheart Dress

$99.00 $59.00 MY-2304SJ1S
Buy Short Sleeveless Empire Waist Dress at PromGirl
  • Navy/Black

Short Sleeveless Empire Waist Dress

$59.00 EM-EDM-1733-433
In Stock Buy Floor Length One Shoulder Prom Dress at PromGirl
  • Navy

Floor Length One Shoulder Prom Dress

$118.00 $59.00 MF-E1502
In Stock Buy Lace Floor Length Strapless Sweetheart Dress at PromGirl
  • Eggplant
  • Champagne
  • Fuchsia
  • Royal

Long Strapless Lace Dress

$129.00 $64.00 DI-K0347B
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • White

Short Strapless Dress

$69.00 MT-MD-3727-3
In Stock Buy Strapless Sweetheart Floor Length Dress at PromGirl
  • Bright Cherry

Strapless Sweetheart Floor Length Dress

$149.00 $69.00 CT-9560QX8A
In Stock Buy Full Length Sweetheart Evening Dress at PromGirl
  • Light Coral

Full Length Sweetheart Evening Dress

$149.00 $69.00 AL-35585
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Turquoise

Short Strapless Sweetheart Dress

$139.00 $69.00 FB-GS1038
In Stock Buy Sexy Red One Shoulder Dress at PromGirl
  • Red

Short Red Prom Dress by Jasz 4216

$199.00 $69.00 JZ-4216
In Stock Buy Short One Shoulder Dress at PromGirl
  • White
  • Lilac
  • Red
  • Turquoise
  • Fuchsia
  • Purple
  • Silver

One Shoulder Party Dress

$129.00 $69.00 DQ-8426-v
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Aqua
  • Electric Blue
  • Lime
  • Yellow

Strapless Party Dress by Alyce 4311

$250.00 $69.00 AL-4311-v
In Stock Buy Floor Length Strapless Dress with Embellished Waist at PromGirl
  • Ivory
  • Neon Hot Coral

Strapless Prom Gown by City Triangles

$149.00 $74.00 CT-8420DW3B
In Stock Buy Strapless Sweetheart Long Prom Dress at PromGirl
  • Tiffany
  • Pink
  • Light Green

Strapless Sweetheart Long Prom Dress

$149.00 $74.00 FB-GL2060
In Stock Buy Strapless Babydoll Prom Dress at PromGirl
  • Champagne/Pink
  • Turquoise/Pink
  • Mint/Pink

Strapless Babydoll Prom Dress

$149.00 $74.00 PO-6880
In Stock Buy Long Strapless Sweetheart Prom Dress at PromGirl
  • Ivory
  • Neon Hot Coral

Strapless Orange Gown by City Triangles

$149.00 $74.00 CT-8420DW3Bnc
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Grape
  • Red

Short Strapless Dress by Mori Lee

$148.00 $74.00 ML-31032
In Stock Buy Floor Length Sleeveless Dress at PromGirl
  • Neon Hot Coral

Floor Length Sleeveless Dress

$149.00 $74.00 CT-8415QV1B
In Stock Buy Long Strapless Chiffon Evening Dress at PromGirl
  • Electric Purple
  • Peacock
  • White
  • Watermelon
  • Sky Blue

Long Strapless Chiffon Evening Dress

$498.00 $75.00 LF-17118
In Stock Buy Short Strapless Sweetheart Prom Dress at PromGirl
  • White/Gold
  • Purple
  • Turquoise

Short Strapless Prom Dress

$150.00 $75.00 DQ-8416
In Stock Buy Strapless Sweetheart Floor Length Dress at PromGirl
  • White
  • Royal

Beaded Strapless Prom Dress

$149.00 $75.00 BD-067A104
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Lilac
  • Pink

Short Strapless Sweetheart Dress

$150.00 $75.00 FB-GS1106
In Stock Buy Classic Strapless Sweetheart Evening Gown at PromGirl
  • Watermelon
  • Turquoise
  • Black

Strapless Beaded Evening Gown

$158.00 $79.00 NA-2807
In Stock Buy Floor Length Sleeveless Sweetheart Dress at PromGirl
  • Purple
  • Teal

Floor Length Sleeveless Sweetheart Dress

$168.00 $79.00 HOW-PM-22453
In Stock Buy Flowing Floor Length Prom Dress at PromGirl
  • Black
  • Turquoise
  • Red
  • Fuchsia
  • Royal Blue
  • Silver
  • Teal

Long Formal Dress for Prom

$149.00 $79.00 DQ-8115-v
In Stock Buy Short Strapless Ruffled Dress at PromGirl
  • Light Blue
  • Light Pink

Short Strapless Prom Dress by Alyce

$138.00 $89.00 AL-3545
In Stock Buy Floor Length Strapless Prom Dress at PromGirl
  • White

Floor Length Strapless Prom Dress

$178.00 $89.00 FB-GL2050
In Stock Buy Scala Short Strapless Sequin Prom Dress at PromGirl
  • Fuchsia

Scala Short Strapless Sequin Prom Dress

$178.00 $89.00 Scala-48404
In Stock Buy Short Strapless Sweetheart White Dress at PromGirl
  • White

Short Strapless White Dress

$90.00 MT-MD-5533
In Stock Buy Long Strapless Bridesmaid Gown at PromGirl
  • Pewter

Long Strapless Bridesmaid Gown

$180.00 $90.00 HOW-PM-22529
In Stock Buy Full Length Strapless Formal Gown at PromGirl
  • Gold
  • Black
  • Purple
  • Fuchsia
  • Turquoise
  • Lime

Full Length Strapless Formal Gown

$189.00 $94.00 DQ-8116
In Stock Buy Long Ombre One Shoulder Gown at PromGirl
  • Spicy Red

Long Ombre One Shoulder Gown

$398.00 $98.00 LF-18398
In Stock Buy Strapless Silver Dress at PromGirl
  • Silver (Silver/Black)
  • Cinnamon

Strapless Prom Gown

$169.00 $99.00 NA-2554
In Stock Buy Elegant Strapless Formal Gown at PromGirl
  • Purple
  • Brown(Chocolate)
  • Black

Strapless Formal Gown for Prom

$199.00 $99.00 DQ-8072
In Stock Buy Strapless Sweetheart Floor Length Dress at PromGirl
  • Cream/Blush/Silver

Strapless Sweetheart Floor Length Dress

$199.00 $99.00 CT-8012RW5B
In Stock Buy Spaghetti Strap Floor Length Dress at PromGirl
  • Black/Nude/Silver

Spaghetti Strap Floor Length Dress

$199.00 $99.00 BN-55008
In Stock Buy Strapless Sweetheart Floor Length Dress at PromGirl
  • Mint

Long Mint Strapless Prom Dress

$199.00 $99.00 DQ-8633
In Stock Buy Long Ruched Open Back La Femme Dress at PromGirl
  • Aquamarine
  • Hot Fuchsia
  • Marine Blue

Long Ruched Open Back La Femme Dress

$398.00 $99.00 LF-19883
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Watermelon

Short Strapless Party Dress

$198.00 $99.00 CD-0504
In Stock Buy Elegant Long Strapless Chiffon Gown at PromGirl
  • Aqua
  • Peacock
  • White

Strapless Evening Gown by La Femme

$398.00 $99.00 LF-17058
In Stock Buy La Femme One Shoulder Sequin Dress at PromGirl
  • Charcoal
  • Navy

La Femme One Shoulder Sequin Dress

$199.00 $99.00 LF-17697
In Stock Buy Floor Length Sweetheart Prom Dress at PromGirl
  • Royal
  • Off White
  • Black

Floor Length Sweetheart Prom Dress

$199.00 $99.00 DQ-8976
In Stock Buy Alyce Strapless High Low Dress at PromGirl
  • Champagne

Alyce Strapless High Low Dress

$398.00 $99.00 AL-A6012
In Stock Buy Sweetheart Sequin Dress by Scala at PromGirl
  • Ivory
  • Navy

Sweetheart Sequin Dress by Scala

$198.00 $99.00 Scala-48349
In Stock Buy Elegant Strapless Formal Gown at PromGirl
  • Purple
  • Brown(Chocolate)
  • Black

Strapless Brown Formal Gown

$199.00 $99.00 DQ-8072br
In Stock Buy Long Strapless Sweetheart Formal Gown at PromGirl
  • Morganite
  • Water

Strapless Long Prom Dress by Alyce

$198.00 $99.00 AL-35595
In Stock Buy Long Strapless Sweetheart Evening Gown at PromGirl
  • Electric Pink

Strapless Beaded Gown by Flirt

$278.00 $99.00 FL-P5830
In Stock Buy Floor Length Strapless Chiffon Gown at PromGirl
  • Wow Pink

Strapless Formal Gown by Alyce 35442

$230.00 $99.00 AL-35442
In Stock Buy Alyce Floor Length Strapless Dress at PromGirl
  • Blue Radiance

Alyce Floor Length Strapless Dress

$330.00 $99.00 AL-6194
In Stock Buy Strapless Sweetheart Floor Length Dress with Lace Detailing at PromGirl
  • White/Nude
  • Royal Blue/Nude

Strapless Lace Gown with Corset Top

$199.00 $99.00 DQ-8856-v
In Stock Buy Strapless Sweetheart Floor Length Dress at PromGirl
  • Watermelon
  • Lilac
  • Royal
  • Baby Pink

Strapless Gown with Slit Skirt

$229.00 $114.00 NA-2808
In Stock Buy Floor Length Strapless Sweetheart Atria Dress at PromGirl
  • Royal Blue
  • Black

Long Strapless Atria Prom Dress 2311

$230.00 $115.00 AT-2311
In Stock Buy Short Lace Strapless Sweetheart Lace Dress at PromGirl
  • Light Teal
  • Royal
  • Black
  • New Red
  • Coral
  • Dark Red
  • Navy

Short Lace Strapless Dress

$119.00 DI-JM1968
In Stock Buy Floor Length Prom Dress by Xcite at PromGirl
  • Black
  • Fuchsia
  • White

Floor Length Prom Dress by Xcite

$238.00 $119.00 XC-30563
In Stock Buy Full Length Strapless Sweetheart Dress at PromGirl
  • Hot Fuchsia
  • Wisteria
  • Marine Blue

Full Length Strapless Sweetheart Dress

$238.00 $119.00 LF-19566
In Stock Buy Long Strapless Sweetheart Dress at PromGirl
  • Peony
  • Kelly Green

Long Strapless Sweetheart Dress

$240.00 $120.00 BJ-866
In Stock Buy Strapless Sweetheart Mermaid Sequin Dress at PromGirl
  • Champagne
  • Olive
  • Pink

Strapless Sequin Mermaid Gown

$249.00 $124.00 DQ-8646
In Stock Buy Floor Length Strapless Sweetheart Dress at PromGirl
  • Coral
  • Tiffany Blue

Floor Length Strapless Sweetheart Dress

$249.00 $124.00 CD-GL-G243
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Nude

Short Strapless Sweetheart Dress

$249.00 $124.00 FB-GS1135
In Stock Buy Short Strapless Sweetheart Homecoming Dress at PromGirl
  • Navy

Strapless Blue Cocktail Dress by Sean

$250.00 $125.00 SN-50539
In Stock Buy Full Length Strapless Formal Gown at PromGirl
  • Ice Blue
  • Pale Pink

Beaded Strapless La Femme Gown

$250.00 $125.00 LF-19233
In Stock Buy Floor Length La Femme Prom Dress at PromGirl
  • Yellow
  • White
  • Watermelon
  • Ocean Blue
  • Light Lime
  • Electric Purple
  • Apricot

Gorgeous La Femme Prom Dress

$250.00 $125.00 LF-16802-v
In Stock Buy Floor Length Strapless Sweetheart Dress at PromGirl
  • Blush
  • Emerald
  • Black
  • Red

Corset Style Strapless Gown

$189.00 $129.00 DQ-8844
In Stock Buy Short Strapless Party Dress at PromGirl
  • Blush

Short Strapless Party Dress

$129.00 BD-797442
In Stock Buy One Shoulder Prom Dress at PromGirl
  • White
  • Pink
  • Teal
  • Aqua
  • Eggplant

White Evening Gown by La Femme 15361

$298.00 $129.00 LF-15361
In Stock Buy Short Strapless Sweetheart JVN by Jovani Dress at PromGirl
  • Red
  • Black
  • Royal

Short Strapless Homecoming JVN by Jovani Dress

$258.00 $129.00 JO-JVN-JVN91202
In Stock Buy Floor Length Strapless Xcite Dress at PromGirl
  • Watermelon
  • Purple
  • Cobalt

Floor Length Strapless Xcite Dress

$258.00 $129.00 XC-30510
* Products with an "in stock" banner have at least some size and color combinations ready to ship immediately. Available sizes and colors may be limited due to seasonality. Please read our complete availability policy for more information.