The launch of RH London, the new UK flagship store for the American home furnishings brand, drew a constellation of stars on Thursday night. Despite a significant heatwave gripping the United Kingdom, celebrities ventured out to the Mayfair party, which celebrated the opening of the luxury homewares brand's new gallery.

Actress Margot Robbie, 35, was among the notable attendees. She arrived in a long-sleeved black ensemble, opting for a covered-up look despite the high temperatures. She completed her appearance with sunglasses as she navigated the crowded venue.

Singer Janet Jackson, 60, also graced the event, choosing a more cooling ensemble of a sheer white shirt paired with a black beret. She was seen holding a fan while posing for photographs.

Bianca Jagger, 81, was present in a white satin suit, complete with matching gloves and a trilby hat. Model Wallis Day, 31, opted for a striking green leather dress with cut-out panels.

The new RH London store is housed in Mayfair's historic 18th-century Palladian mansion at No. 7 Burlington Gardens, alongside two adjoining Grade II-listed buildings. The expansive space is designed to showcase the brand's offerings and includes two restaurants, two bars, and a tea salon.

Robbie is currently engaged in pre-production for an upcoming Ocean's Eleven prequel film, produced by her company LuckyChap Entertainment. Bradley Cooper is attached to the project as the leading man, screenwriter, and director. The film, which lost its previous director Lee Isaac Chung due to creative differences, is slated to film in Nice and Monaco between August and October. Robbie previously confirmed that the movie will be set during the 1962 Monaco Grand Prix and will focus on the parents of Danny Ocean, the character central to the Ocean's 11 heist narrative.