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.

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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 change: 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 instalment 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 was 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.

Wrap up warm! she added a faux fur stole to her prom dress outfit for instant glamour

Blue electric! Natalie Dormer kept her embellished premiere dress on for the after party

Natalie Dormer put her eclectic style credentials on show as she mixed a structured black fabric with an electric blue sheer skirt and sleeves.

Blonde beauty Natalie co-ordinated her midnight blue eye make-up with her dress as she walked the red carpet in the two-tone design.

Meanwhile Jena Malone posed in her ultra revealing retro white and yellow dress.

Risky retro! Jena Malone had a wardrobe malfunction earlier in the night posing in her white and yellow dress

Casual cover-up! Jena added a baseball jacket as she made her way from the premiere to the after party and dinnger

She kept a tight hold on her dangerous thigh split, which revealed a little more than she bargained for on the red carpet earlier in the night.

Giving the London club some man power was Sam Claflin, who donned a burgundy double-breasted jacket against a bright white shirt.

Donald Sutherland  and Stanley Tucci both looked suave in a classic black tailored suits.

Sexy Sam! Sam Cafflin opted for a burgundy jacket with wool trousers for his look