Gwyneth, SJP, and Kate Hudson Sparkle at Star-Studded Tiffany & Co. Ball

Gwyneth Paltrow took a break from her promotional duties for Iron Man 3 to party with Sarah Jessica Parker, Kate Hudson, and many more A-listers at Tiffany & Co.'s Blue Book Ball in NYC last night. She wore a blue Ralph Lauren gown as she mingled on the carpet and inside the party with a Reem Acra-wearing Kate; SJP, who wore a vintage Vicky Tiel gold frock; and Jessica Biel in a navy Elie Saab number. Meanwhile, Carey Mulligan wore a Victoria Beckham black suit at the bash, which featured jewels that were designed for her new film, The Great Gatsby, and chatted with an elegantly dressed Michelle Williams, who donned a dress by Katie Ermilio. Naturally, all of the ladies wore jewels by Tiffany & Co.

Gwyneth had to miss out on the London premiere for her new flick, which took place yesterday after getting rescheduled due to Margaret Thatcher's funeral earlier this week. However, she did fit in press duties while in the UK, including making an appearance on The Graham Norton Show and getting cute at a photocall with her costar Robert Downey Jr.