Sienna Miller and Tom Sturridge attend a family birthday in effortless party style

Rex

Tom Sturridge and Sienna Miller joined an assortment of A-list guests including Melissa Odabash and Kelly Hoppen to help celebrate Sienna’s stepsister, Natasha Corrett’s 30th birthday party at Paradise by Kensal Green in London.

HAIR UPDOS

Natasha, who is the author of Honestly Healthy, an organic, vegetarian gourmet cookbook, has created her own cult following with Robbie Williams citing her recipes as “healthy yet ridiculously delicious." Victoria Beckham and Natalie Imbruglia are keen fans of the alkaline diet championed by Natasha.

Sienna and fiancé Tom Sturridge looked happy as they enjoyed a rare evening out without their daughter, Marlowe, mingling with other guests. The actress also went back to her boho-chic fashion roots by adorning a pink and blue tie-dye dress with her hair styled in a relaxed updo.

MOST STYLISH CELEBRITY COUPLES

The celebrity couple have also been in the news recently after images were released of their new Burberry Autumn Winter 2013 campaign shoot that was shot by world-renowned fashion photographer Mario Testino.