Alexa Chung dazzles in show-stopping gown at Portrait Gala

As always, Alexa Chung was the leader of the style pack on Tuesday night, as she perfectly complemented the balmy temperatures in London in a spring-like gown. Scroll down for video The style pack: Alexa Chung turned out for the glamorous 2017 Portrait Gala in London on Tuesday night in the company of Rosamund Pike, Arizona Muse and Donna Air as the stylish attendees Fashion darling Alexa was sure to command attention in her show-stopping ensemble which displayed her delicate decolletage when she stepped out on the carpet with her dearest father - who is retired graphic designer. Chic: With billowing off-shoulder sleeves, her dazzling number highlighted her slender frame as the top hugged her waist before kicking out into a full skirt Family affair: Alexa wowed the style brigade once again as she slipped into a stunning bardot polka dot gown while arriving at the National Portrait Gallery in London for the 2017 Portrait Gala on Tuesday night with her father Philip Chung Show-stopper: Alexa showcased her decolletage in the flirty number Must dash: Later on in the evening, Alexa could be seen holding onto her delicate gown leaving the star-studded bash Monochrome muse: Monochrome appeared to be a theme of the evening with both Alexa and Rosamund in complementing looks Sing star: Hit singer Laura Mvula showcased her vocal talents - sans shoes - at the bash Demure: Also attending the cultural evening was The Duchess of Cambridge, who dazzled in an emerald green look Alexa - who attended the cultural evening with her father Philip - complemented her dreamy look with an elegant old Hollywood inspired wave into her glossy tresses - which showcased her dainty diamond drop-earrings. Fashion fiend: Full of whimsical promise, her handkerchief hemmed designer garment featured 3D embellishment of the same polka dot material throughout the bodice and skirt Demure: She complemented her dreamy look with an elegant old Hollywood inspired wave into her glossy tresses - which showcased her dainty diamond drop-earrings Fairytale: The piece added a modern twist when she turned around to reveal full-length zipper detail and black clasp Texture: The British beauty teamed her magical look with a velvet clutch which she held in her ring decorated hand New heights: She injected height into her frame with a pair of strappy black heels as she made her way inside the venue Though not caught in the same frame, it's known that Alexa attended Alex's film screening at the Picturehouse Central in London, in September 2016. Reunited: Alexa and her boyfriend Alexander Skarsgard were seen in New York last week, marking the first time the couple have been seen together since September 2016 Style stars: Alexa caught up with magazine publisher Caroline Issa - who wowed in a chic tailored white tuxedo Picture perfect: Alexa posed for a photo with director of the National Portrait Gallery Nicholas Cullinan Victorian vixen: Rosamund Pike turned up to the bash in a Victorian inspired gown Perfect pair: Model Arizona Muse and fiancee Boniface Verney Carron attended the star-studded soiree Art deco darling: The 28-year-old American beauty donned a show-stopping backless number for the evening In the style: Arizona was later seen leaving the gallery in style, gracefully holding onto her dress A touch of spring: Donna Air was a breath of fresh air in her polka dot inspired blush summer dress Camera ready: Alexa stopped for a photo with Samantha Cameron and Sophie Ellis-Bextor In contrast: The trio looked stylish in their contrasting ensembles for the evening It was an intimate meeting between Alex, Alexa and his mother My - who was married to Alex's actor father Stellan Skarsgard from 1975 to 2007 - on a hot day in July.