Despite the rainy weather, the bubbly blonde beamed as she took to the red carpet at the annual event, showing off her womanly curves in the tight-fitting, draped dress with its thigh-high split. She accessorised the glamorous number with a dazzling silver necklace, a loose up-do and red lips.
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Joining Holly on the red carpet was Sienna Miller. Sporting a decidedly different look from her punk-inspired outfit at last week's Met Ball, the actress was girly in a powder blue Matthew Williamson pleated frock.
The new mum accessorised with studded heels, dazzling diamond earrings and an on-trend perspex clutch.
Also opting for a pale hue was former EastEnders actress Kara Tointon. The brunette beauty wowed in a nude embellished creation that was perfectly offset by her vintage 'do.
Another addition to the pale brigade was Kimberly Wyatt, who was channelling old Hollywood glamour with her side-swept curls, red lips and draped gown.
A host of stars from Made In Chelsea, which won Best Reality Show, stepped out for the prestigious event.
Despite the windy conditions that saw her panelled Sass & Bide dress blow up, Millie Mackintosh looked typically stunning. Costar Binky was pretty in a fluoro pink gown. She posed up with fellow cast members Louise Thompson and Lucy Watson, who appeared to have put their differences behind them for the evening.
While Louise arrived with rumoured new boyfriend and fellow MIC star Andy Jordan, Lucy made her red carpet debut with new boyfriend Spencer Matthews, who recently split from Louise on the reality show.