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 Sweetheart Short Dress by XOXO at PromGirl
  • Cobalt

Strapless Blue Cocktail Dress

$79.00 $19.00 XO-2523ST11
In Stock Buy Short Strapless Sweetheart Print Dress at PromGirl
  • White/Neon Pink

Short Strapless Sweetheart Print Dress

$49.00 $19.00 CT-4326DT2A
In Stock Buy Short Strapless Sweetheart Print Dress at PromGirl
  • Black/White

Short Strapless Sweetheart Print Dress

$49.00 $19.00 AS-i796661z8
In Stock Buy Short Strapless Lace Summer Dress at PromGirl
  • Peach

Short Strapless Lace Dress

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

Knee Length Strapless Sweetheart Dress

$49.00 $24.00 MY-6904gu1s
In Stock Buy Short Strapless Sweetheart Black Dress at PromGirl
  • Black

Short Strapless Sweetheart Black Dress

$49.00 $24.00 TR-D31158-1
In Stock Buy Short Strapless Dress at PromGirl
  • Black

Short Strapless Dress

$49.00 $24.00 TW-3922
In Stock Buy High Low Spaghetti Strap Dress at PromGirl
  • Teal/Blue

High Low Spaghetti Strap Dress

$49.00 $24.00 CT-2816DB2F
In Stock Buy Short Sleeveless Dress at PromGirl
  • Black
  • Royal Blue
  • Coral

Short Sleeveless Dress

$29.00 CCC-6C9295
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 Strapless Sweetheart Dress at PromGirl
  • Cream/Dust Slate/Cream

Short Strapless Sweetheart Dress

$89.00 $29.00 BD-7DFC263
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Ivory/Black

Short Strapless Sweetheart Dress

$69.00 $29.00 IM-5322-0161C
In Stock Buy Short White Strapless Sweetheart at PromGirl
  • Black

Short White Strapless Dress

$79.00 $29.00 MT-MD-3727
In Stock Buy Strapless Ruched Pink Party Dress at PromGirl
  • Lavender
  • Pink
  • Light Teal
  • Black
  • Champagne
  • Red

Strapless Ruched Party Dress

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

Short Strapless Sweetheart Dress

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

Short Strapless Sweetheart Dress

$69.00 $34.00 MT-MD-5661
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/Black/Nude

Short Strapless Sweetheart Dress

$39.00 EM-BFB-1027-028
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Lavender
  • Mint
  • New Red
  • Peach
  • New Teal

Beaded Strapless Short Dress

$99.00 $39.00 DI-JM2597
In Stock Buy Short Sexy Ruched Dress at PromGirl
  • Red

Sexy Homecoming Dress by Jasz

$198.00 $45.00 JZ-4475
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 Floor Length Strapless Dress at PromGirl
  • Black
  • Fuchsia

Strapless Lace Gown with Bow

$99.00 $49.00 DI-3586
In Stock Buy Full Length Strapless Sweetheart Dress at PromGirl
  • Purple Passion
  • Poppy

Strapless Prom Dress by Flirt P2779

$258.00 $49.00 FL-P2779
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/Fuchsia
  • Zebra/Purple

Short Zebra Print Party Dress

$99.00 $49.00 DQ-8103
In Stock Buy Classic Long Strapless Sweetheart Gown at PromGirl
  • Plum
  • Royal

Classic Long Strapless Gown

$99.00 $50.00 PO-5986
Buy Short Strapless Prom Dress by La Femme at PromGirl
  • Copper/Black
  • White/Black
  • Silver/Black

Metallic Mini Dress by La Femme

$278.00 $58.00 LF-15890
In Stock Buy Short One Shoulder Tulle Dress at PromGirl
  • Turquoise
  • Fuchsia

One Shoulder Party Dress

$149.00 $59.00 DQ-8030
Buy La Femme 12340 Prom Dress at PromGirl
  • Chocolate
  • Black
  • Copper
  • Purple
  • Royal
  • Turquoise

La Femme 12340 Prom Dress

$298.00 $59.00 LF-12340
Buy Short One Shoulder Prom Drses at PromGirl
  • Turquoise
  • Fuchsia

One Shoulder Pink Party Dress

$149.00 $59.00 DQ-8030f
In Stock Buy Lace Floor Length Strapless Sweetheart Dress at PromGirl
  • Eggplant
  • Navy
  • 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 Sexy Red One Shoulder Dress at PromGirl
  • Red

Short Red Prom Dress by Jasz 4216

$199.00 $69.00 JZ-4216
In Stock Buy Floor Length Strapless Sweetheart Print Dress at PromGirl
  • Fuchsia

Strapless Print Prom Dress

$219.00 $69.00 DQ-8088
In Stock Buy Floor Length Strapless Dress with Embellished Waist at PromGirl
  • Ivory
  • Neon Hot Coral
  • Navy

Strapless Prom Gown by City Triangles

$149.00 $74.00 CT-8420DW3B
Buy Floor Length Strapless Prom Dress at PromGirl
  • Ivory
  • Neon Hot Coral
  • Navy

Strapless Ivory Gown by City Triangles

$149.00 $74.00 CT-8420DW3Bw
Buy Long Strapless Sweetheart Prom Dress at PromGirl
  • Ivory
  • Neon Hot Coral
  • Navy

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 Strapless Sweetheart Floor Length Dress at PromGirl
  • White
  • Royal

Beaded Strapless Prom Dress

$149.00 $75.00 BD-067A104
Buy Floor Length Strapless Dress at PromGirl
  • White
  • Royal

Beaded Strapless Long White Dress

$149.00 $75.00 BD-067A104w
Buy Sleeveless Floor Length La Femme Prom Dress at PromGirl
  • Hot Pink

Shimmering Evening Gown by La Femme 14425

$298.00 $78.00 LF-GI-14425
In Stock Buy Short Strapless Sweetheart White Dress at PromGirl
  • White
  • Pink

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
  • Yellow
  • Majestic Purple
  • Turquoise

Long Ombre One Shoulder Gown

$398.00 $98.00 LF-18398
In Stock Buy High-Low Spaghetti Strap Dress at PromGirl
  • Cotton Candy Pink
  • Aqua
  • Peacock
  • Wisteria
  • Yellow

High-Low Spaghetti Strap Dress

$398.00 $98.00 LF-17141
In Stock Buy Short Strapless La Femme Prom Dress at PromGirl
  • Watermelon
  • Light Lime
  • Black
  • Lavender
  • White

La Femme Short Strapless Prom Dress

$198.00 $98.00 LF-17649
In Stock Buy Elegant Strapless Formal Gown at PromGirl
  • Gold
  • Red
  • Purple
  • Brown(Chocolate)
  • Teal
  • Green
  • 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 Sequin One Shoulder Cocktail Dress at PromGirl
  • Charcoal
  • Ocean Blue
  • Majestic Purple

Sequin One Shoulder Cocktail Dress

$298.00 $99.00 LF-16886
Buy Long Ruched Strapless Mermaid Gown at PromGirl
  • Red/Nude

Long Ruched Strapless Mermaid Gown

$450.00 $99.00 LF-18282
In Stock Buy Strapless Sweetheart Sequin Dress by Scala at PromGirl
  • Black/Silver/Gold

Strapless Sequin Dress by Scala 47488

$198.00 $99.00 Scala-47488
Buy Long Strapless Sweetheart Prom Dress by La Femme at PromGirl
  • Turquoise

Strapless Prom Dress by La Femme 14574

$250.00 $99.00 LF-GI-14574
Buy Elegant Strapless Formal Gown at PromGirl
  • Gold
  • Red
  • Purple
  • Brown(Chocolate)
  • Teal
  • Green
  • 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 Short Two Piece Mesh Dress at PromGirl
  • Black

Short Two Piece Mesh Dress

$109.00 WC-K3184
In Stock Buy Floor Length Strapless Sweetheart Atria Dress at PromGirl
  • Royal Blue

Long Strapless Atria Prom Dress 2311

$230.00 $115.00 AT-2311
Buy Long Strapless Sequin Dress at PromGirl
  • Royal Blue/Silver

Long Strapless Sequin Dress

$398.00 $118.00 LF-17915
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 Long Strapless Sweetheart Dress at PromGirl
  • Peony
  • Kelly Green

Long Strapless Sweetheart Dress

$240.00 $120.00 BJ-866
In Stock Buy Strapless Empire Waist Formal Gown at PromGirl
  • Orchid

Strapless Empire Waist Formal Gown

$250.00 $125.00 ST-12468
In Stock Buy Short Strapless Party Dress at PromGirl
  • Blush

Short Strapless Party Dress

$129.00 BD-797442
In Stock Buy Floor Length Strapless Sweetheart JVN by Jovani Dress at PromGirl
  • Aqua
  • Blush

Strapless Prom Gown JVN by Jovani

$270.00 $129.00 JO-JVN-JVN2563
In Stock Buy Long Strapless Sequin Dress at PromGirl
  • Green
  • Pearl

Long Strapless Sequin Dress

$498.00 $138.00 LF-17369
In Stock Buy Short A-Line Sweetheart Dress at PromGirl
  • Magenta
  • Watermelon
  • Ultra Green

Short Party Dress

$138.00 NA-2824
Buy La Femme 17530 Prom Dress at PromGirl
  • Teal
  • Lavender
  • White

La Femme 17530 Prom Dress

$398.00 $138.00 LF-17530
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 Strapless Empire Waist Chiffon Gown at PromGirl
  • Marine Blue
  • Purple
  • Spearmint

Strapless Empire Waist Chiffon Gown

$278.00 $139.00 FA-7366
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Lilac/White
  • Navy/Navy
  • Red/Nude
  • Royal/Yellow

Short Strapless Sweetheart Dress

$140.00 HOW-DA-52340
In Stock Buy Short Strapless Sweetheart Dress by Atria at PromGirl
  • Ivory

Short Strapless Sweetheart Dress by Atria

$286.00 $143.00 AT-AC81533
Buy Full Length Strapless Dress at PromGirl
  • Lavender
  • Aquamarine
  • Nude

Full Length Strapless Dress

$450.00 $148.00 LF-18544
Buy Ruched Strapless Sweetheart Dress at PromGirl
  • Royal Blue
  • Magenta
  • Black

Ruched Strapless Sweetheart Dress

$450.00 $148.00 LF-18563
In Stock Buy Strapless Empire Waist Formal Gown at PromGirl
  • Magenta

Strapless Empire Waist Formal Gown

$398.00 $148.00 LF-18843
Buy Long Strapless Sweetheart Chiffon Gown at PromGirl
  • Bright Purple
  • Peacock
  • Sherbert
  • Watermelon

Long Strapless Gown by La Femme

$398.00 $148.00 LF-18733
Buy Elegant Strapless Formal Gown at PromGirl
  • Pale Peach

Elegant Strapless Formal Gown

$498.00 $148.00 LF-18273
Buy Long Strapless Ruched Mermaid Gown at PromGirl
  • Blue/White

Long Strapless Ruched Mermaid Gown

$498.00 $148.00 LF-18286
Buy Long Strapless Sweetheart Chiffon Gown at PromGirl
  • Tropical Turquoise
  • Electric Purple
  • Watermelon

Long Strapless Sweetheart Chiffon Gown

$398.00 $148.00 LF-18909
Buy Floor Length La Femme Prom Dress at PromGirl
  • Ivory

Floor Length La Femme Prom Dress

$450.00 $148.00 LF-15418
Buy Long Blue Open Back Strapless Dress at PromGirl
  • Watermelon
  • Midnight Blue

Long Blue Open Back Strapless Dress

$450.00 $148.00 LF-18560
Buy Full Length Strapless Formal Gown at PromGirl
  • Purple Mist
  • Kiwi Green
  • Coral
  • Watermelon

Full Length Strapless Formal Gown

$318.00 $148.00 LF-18219
* 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.