Jennifer Lawrence swapped her Dior gown for a plunging white number as she left the Hunger Games premiere and headed to the after party on Monday evening.

With a very deep v-shape and cutout detailing across one edge, there was a lot of cleavage on show as the 24-year-old let her 𝓈ℯ𝓍y side out.

She wasn’t the only cast member to mix things up, and Elizabeth Banks swapped her billowing gown for a metallic pink fairytale number.

Sexy siren! Jennifer Lawrence showed off her racy side in plunging white dress at the Hunger Games after party in London

Prom princess! Elizabeth Banks wore a pink puffball dress but kept it sleek with a metallic edge

Joined by her fellow actors, Jennifer decided to switch up her dress, trading in her modest quilted number for a glamorous, figure-hugging gown.

It wasn’t just her cleavage on show; Jen’s dress came with a thigh-high split on one side, revealing her leg.

All her work on The Hunger Games has clearly paid off, as the young star looked perfectly toned in the tight white ensemble.

All changed: Jennifer and Elizabeth were sporting different looks earlier on in the evening

Riding thigh-high! Jennifer Lawrence is one of the biggest stars in Hollywood at just 24

Katniss Everdeen! Jen Law celebrated the screening of the third installment of her major franchise, The Hunger Games

Her shapely arms and perfect pins looked great as she posed for the cameras.

The Katniss Everdeen actress kept her loose, wavy up-do, although she lost the thin headband she had worn earlier on the red carpet.

Her eye makeup was still dramatic and dark, making even more of an impact with her 𝓀𝒾𝓁𝓁er dress.

Kat-eyes! Jennifer went for dramatic dark eye make-up with girly pink lipstick

Cleavage couture! After her high-necked red carpet dress, Jennifer let her neckline slip a lot

She kept jewellery to a minimum, with simple studs and a ring on one hand.

She added silver sandals to tie the whole metallic and white look together.

Joining her at the Bloomsbury Ballroom in London was fellow co-star Elizabeth Banks, who plays Effie Trinket.

The 40-year-old switched up one girly dress for another as she took off her dramatic mixed-print dress and put on a metallic pink prom dress.

White hot! With white nails and simple jewellery, it was all about the dress

The blonde star wore a cute strapless pastel dress with a full mid-length skirt and matching metallic waist belt.

Like Jennifer, she kept it low-key with the accessories, adding a box clutch, strappy sandals, and a thin necklace.

The rest of the cast was on hand for the post-premiere celebrations, although they kept their original outfits.