Stella McCartney had the company of her famous friends last night to celebrate her 40th birthday. Kate Hudson brought Matt Bellamy along to Asprey House, near Hyde Park Corner, and Gwyneth Paltrow was seen booking it out to her car afterward, holding two celebratory mugs that read "Stella's 40th" and featured a picture of young Stella. Paul McCartney and his fiancée, Nancy Shevell, flew in for the occasion, as did designer Tom Ford. Bono, his wife Ali Hewson, and Kate Moss were out for the long haul. They accompanied Stella for some late fun at the Groucho Club. Stella was decked out for the festivities in a blue-sequined dress of her own design while Kate Moss paired her Azarro jumpsuit with one of Stella's bags. Kate Hudson chose to go with a number from Elie Saab. Kate Moss's own significant other, Jamie Hince, wasn't able to join in, since he's off on tour with The Kills in Mexico; however, she arrived with artist Peter Blake, who designed the Sgt. Pepper's Lonely Hearts Club Band album cover for Paul and The Beatles. There may be more partying in Stella's future, as she's set to show her Spring 2012 designs on Oct. 3 during Paris Fashion Week.