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 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 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 Silver Dress at PromGirl
  • Silver (Silver/Black)
  • Cinnamon

Strapless Prom Gown

$169.00 $99.00 NA-2554
In Stock Buy Long Chiffon Formal Dress by Alyce at PromGirl
  • Sapphire
  • Hot Pink
  • Coral
  • Sand

Long Chiffon Formal Dress by Alyce

$318.00 $159.00 AL-35672
In Stock Buy Full Length Strapless Formal Gown at PromGirl
  • Gold
  • Purple
  • Fuchsia
  • Turquoise
  • Lime

Full Length Strapless Formal Gown

$189.00 $94.00 DQ-8116
In Stock Buy Floor Length Strapless Sweetheart Dress at PromGirl
  • Red
  • Pink
  • Coral

Long Strapless Prom Gown

$179.00 DQ-8693
In Stock Buy Floor Length Strapless Sweetheart Dress at PromGirl
  • Mint Green

Strapless Lace Up Gown

$199.00 NA-8121
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 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 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 Strapless Ruched Pink Party Dress at PromGirl
  • Pink
  • Light Teal
  • Red

Strapless Ruched Party Dress

$69.00 $34.00 DI-JM1363
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Coral/White
  • Black/Fuchsia
  • Black/Purple
  • Black/Teal

Strapless Short Party Dress

$149.00 FB-GS1055
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 Short Lace Strapless Sweetheart Lace Dress at PromGirl
  • Coral
  • Light Teal
  • New Red

Short Lace Strapless Dress

$119.00 DI-JM1968
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 Strapless Floor Length Dress at PromGirl
  • Navy

Bead Strapless Gown by Sean Collection

$318.00 $199.00 SN-50511
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
  • Navy

Short Strapless Sweetheart Dress by Ruby Rox

$59.00 $29.00 RR-FPS12241i4-465
In Stock Buy Short Strapless Sweetheart Dress  at PromGirl
  • Mint
  • Coral
  • Silver
  • Tiffany
  • Pink

Short Strapless Prom Dress

$139.00 FB-GS1139
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Black/Fuchsia

Short Strapless Sweetheart Dress

$69.00 $39.00 WC-K1751
In Stock Buy Long One Shoulder Ruched Dress at PromGirl
  • Royal
  • Eggplant
  • Red
  • Light Teal
  • Pink
  • Black
  • Green

Elegant One Shoulder Gown for Prom

$99.00 $59.00 DI-15218
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 JVN by Jovani Dress at PromGirl
  • Royal
  • Red
  • Orange
  • Black
  • Blush

Strapless Evening Gown JVN by Jovani

$278.00 $189.00 JO-JVN-JVN90365
In Stock Buy JVN by Jovani Long Strapless Sweetheart Lace Embellished Dress at PromGirl
  • Nude/White
  • Black/White

Strapless Long Prom Dress JVN by Jovani

$378.00 $249.00 JO-JVN-JVN91085
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 Strapless Sweetheart Ombre Formal Gown at PromGirl
  • Jade

Open Back Prom Dress by La Femme

$398.00 $299.00 LF-18525
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • White

Short Strapless Dress

$69.00 MT-MD-3727-3
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 Long Embellished Sweetheart Gown at PromGirl
  • Watermelon
  • Seafoam
  • White
  • Apricot
  • Black

Cut Out Prom Gown by La Femme 18602

$398.00 $189.00 LF-18602
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 La Femme Prom Dress at PromGirl
  • Aquamarine
  • Lavender
  • Apricot

Floor Length La Femme Prom Dress 18989

$338.00 $249.00 LF-18989
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 Strapless Sweetheart Homecoming Dress at PromGirl
  • Navy

Strapless Blue Cocktail Dress by Sean

$250.00 $125.00 SN-50539
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Ivory
  • Turquoise

Short Strapless Sweetheart Dress

$69.00 $34.00 NA-2820
In Stock Buy Floor Length Strapless Sweetheart Dress at PromGirl
  • Coral

Floor Length Strapless Sweetheart Dress

$99.00 $59.00 MY-2304SJ1S
In Stock Buy One Shoulder Dress with Side Slit at PromGirl
  • Light Mint
  • Wisteria
  • Jungle Green
  • Hot Coral
  • Indigo

One Shoulder Dress with Side Slit

$298.00 $149.00 LF-19793
In Stock Buy Strapless Sweetheart Formal Gown at PromGirl
  • Sapphire Blue
  • White
  • Light Purple
  • Watermelon
  • Papaya
  • Cotton Candy Pink
  • Jungle Green

Beaded Strapless Prom Gown by La Femme

$358.00 $149.00 LF-17909
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 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 Short Fitted Strapless Dress at PromGirl
  • Black/Gold

Short Fitted Strapless Dress

$59.00 $29.00 WC-K1744
In Stock Buy Short Strapless Sweetheart White Dress at PromGirl
  • White

Short Strapless White Dress

$90.00 MT-MD-5533
In Stock Buy JVN by Jovani Strapless Sweetheart Floor Length Dress at PromGirl
  • Light Peach

JVN by Jovani Strapless Floor Length Prom Dress

$358.00 $229.00 JO-JVN-JVN79063
In Stock Buy JVN by Jovani One Shoulder Rhinestone Embellished Floor Length Dress at PromGirl
  • Black
  • White
  • Coral

One Shoulder Gown JVN by Jovani

$358.00 $269.00 JO-JVN-JVN91220
In Stock Buy La Femme Strapless Prom Dress at PromGirl
  • Black
  • Neon Grapefruit

La Femme Strapless Prom Dress

$378.00 $189.00 LF-20968
In Stock Buy Long Strapless Alyce Prom Dress at PromGirl
  • Light Turquoise
  • White
  • Petal Pink
  • Red

Long Strapless Alyce Prom Dress

$238.00 $149.00 AL-35620
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 Strapless Sweetheart Floor Length Dress at PromGirl
  • Mint

Long Mint Strapless Prom Dress

$199.00 $99.00 DQ-8633
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Cream

Short Strapless Sweetheart Dress

$69.00 $34.00 MT-MD-5661
In Stock Buy Long Open Back Sweetheart Dress at PromGirl
  • Ice Blue
  • White
  • Hot Coral
  • Lavender

La Femme Designer Prom Dress 18841

$478.00 $199.00 LF-18841
In Stock Buy La Femme 17521 Prom Dress at PromGirl
  • Navy
  • Peacock
  • Watermelon

La Femme Prom Dress 17521

$338.00 $219.00 LF-17521
In Stock Buy Floor Length Sweetheart Evening Gown at PromGirl
  • Nude
  • Pink
  • Coral
  • Watermelon

Beaded Evening Gown by Nina Canacci

$338.00 $199.00 NC-1040
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 Flowing Strapless Sweetheart Formal Gown at PromGirl
  • Watermelon
  • Apricot
  • Jungle Green

La Femme Long Strapless Dress 18774

$398.00 $139.00 LF-18774
In Stock Buy Strapless Floor Length Print Dress at PromGirl
  • Print

Strapless Floor Length Print Dress

$199.00 $149.00 DQ-8659
In Stock Buy Long Strapless Sequin Dress at PromGirl
  • Green

Long Strapless Sequin Dress

$498.00 $138.00 LF-17369
In Stock Buy Strapless La Femme Long Prom Dress at PromGirl
  • Royal Blue

Strapless La Femme Long Prom Dress

$398.00 $199.00 LF-20557
In Stock Buy Floor Length Strapless Sweetheart Dress at PromGirl
  • Sky Blue
  • White

Long Beaded Strapless Sweetheart Dress

$249.00 $149.00 TI-GL-DL106
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 Floor Length Strapless Sweetheart Dress at PromGirl
  • Black
  • Green

Strapless Sequin Mermaid Gown

$198.00 $139.00 DQ-8440
In Stock Buy Floor Length Sleeveless Sequin Dress at PromGirl
  • Red
  • Royal
  • Silver
  • Turquoise
  • Coral
  • Emerald
  • Pink

Long Sequin Prom Dress

$229.00 $149.00 DQ-8468
In Stock Buy Short A-Line Sweetheart Dress at PromGirl
  • Magenta
  • Watermelon
  • Ultra Green

Short Party Dress

$138.00 NA-2824
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 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 Floor Length Cap Sleeve Prom Dress at PromGirl
  • Aqua

Floor Length Cap Sleeve Prom Dress

$298.00 $149.00 CD-GL-G314
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 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 High Low Strapless Sweetheart Dress at PromGirl
  • Navy/Silver

High Low Strapless Sweetheart Dress

$79.00 $39.00 RR-GPJ12458I
In Stock Buy Full Length Sweetheart Evening Dress at PromGirl
  • Jungle Green
  • Hot Coral
  • Navy
  • Apricot
  • Lemon
  • Black
  • Light Mint

Formal Evening Gown by La Femme 19882

$298.00 $199.00 LF-19882
* 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.