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 Gold Foil Print Dress at PromGirl
  • Gold

Strapless Foil Print Dress

$39.00 $19.00 CL-D40145
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 Lace Dress at PromGirl
  • Mint

Short Strapless Sweetheart Lace Dress

$49.00 $19.00 CT-3007Z53K
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 Sweetheart Dress at PromGirl
  • Green/Red

Short Strapless Sweetheart Dress

$49.00 $19.00 CT-2794BG2F
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 Striped Spaghetti Strap Dress at PromGirl
  • Coral/Coral

Short Striped Spaghetti Strap Dress

$69.00 $19.00 BD-HX1914305
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 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 Empire Waist Dress at PromGirl
  • Mint

Strapless Short Prom Dress

$129.00 $29.00 BD-I0791571
In Stock Buy High Low Strapless Dress at PromGirl
  • Jade

High Low Strapless Dress for Homecoming

$79.00 $29.00 MY-2099sj1s
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 Black Dress by Tempation at PromGirl
  • Black

Short Black Dress by Temptation

$158.00 $29.00 TE-2013
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
  • White
  • Black
  • Champagne
  • Red

Strapless Ruched Party Dress

$69.00 $34.00 DI-JM1363
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 Dress at PromGirl
  • Ivory/Lipstick

Short Strapless Dress

$69.00 $34.00 LA-23370
In Stock Buy Short Lace Spaghetti Strap Dress at PromGirl
  • Black/Nude

Short Lace Spaghetti Strap Dress

$78.00 $39.00 MT-7109
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 Ruched Strapless Sweetheart Dress at PromGirl
  • Eggshell/Black

Short Ruched Strapless Sweetheart Dress

$79.00 $39.00 CT-9560KC5D
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 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 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 Dress at PromGirl
  • Black

Short Strapless Dress

$49.00 TW-3922
In Stock Buy Short Strapless Sweetheart Dress at PromGirl
  • Lavender
  • Mint
  • New Red
  • Peach
  • New Teal

Beaded Strapless Short Dress

$99.00 $50.00 DI-JM2597
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 Short Strapless Sweetheart Dress at PromGirl
  • Silver

Short Strapless Party Dress

$119.00 $59.00 DQ-8336
In Stock Buy Lace Floor Length Strapless Sweetheart Dress at PromGirl
  • Eggplant
  • Champagne
  • Navy
  • Fuchsia
  • Royal

Long Strapless Lace Dress

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

High Low Strapless Party Dress

$99.00 $69.00 BD-0676361
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 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 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
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 Open Back Lace Gown at PromGirl
  • Coral

Floor Length Open Back Lace Gown

$149.00 $74.00 JU-47705
In Stock Buy Floor Length Sleeveless Dress at PromGirl
  • Neon Hot Coral

Floor Length Sleeveless Dress

$149.00 $74.00 CT-8415QV1B
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 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 Dress at PromGirl
  • Black/Gold

Short Strapless Sweetheart Dress

$160.00 $80.00 BA-A15952
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 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 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 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
* 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.