On Thursday, the Harry Potter actress, 33, rocked up at the star-studded event in an understated but glamorous maxi dress, which featured a plunging neckline and fringes on the waistline that cascaded over a sheer pleated bottom.
The actress, who had her hair in a loose bun, paired her look with pearl earrings, a white clutch bag and white heels.
The star, who was spotted sitting next to Anna Wintour at the US Open the day before, attended the ceremony with her brother Alex Watson, who she has previously described as her “best friend” in Instagram posts.
She also rubbed shoulders at the event with a string of other famous faces, including model Kaia Gerber.
Gerber is the daughter of supermodel Cindy Crawford and Rande Gerber, the multi-millionaire businessman who co-owns the famous CasaMigos tequila with pal George Clooney.
Kaia showed off her model figure in a striking low-cut metallic dress and strappy heels.
Also in attendance was Julia Fox, who donned a silky mini dress with an image of a topless woman on it and Mary Jane boots.
The Crown’s Emma Corrin was on their usual quirky form in a lacy black fitted top under an oversized white shirt with a pair of brown trousers.
Actor Alan Cumming, who looked smart in a black suit and pair of trainers, also partied at the event along with Paul Mescal, Haley Lu Richardson, Oscar Isaac and wife, Elvina Lind.
And Just Like That’s Karen Pittman, Mae Martin, Evan Mock, designer Thom Browne, The Bear’s Ayo Edebiri, Daniel Kaluuya, and Julia Fox were also spotted at the bash.
This is the second year of the awards for Soho House, which is a members club with branches all over the world. It boasts many stars and creatives, who are primarily movers and shakers in the arts, as its members.
According to Soho House’s website, last night’s event was “designed to recognise and spotlight the incredible work of creative talents across our membership: from established icons to future stars, undiscovered changemakers and all of those in between”.