The afterparty fun following last night's Costume Institute Gala continued on, with even more celebs heading over to the main bash at the Mark hotel. Diane Kruger traded her long-sleeved white Calvin Klein gown for a short red number to attend with Joshua Jackson. She evidently hopes that soon he'll be more than a boyfriend — when a reporter asked if a ring she was wearing signified an engagement, Diane said, "I wish." Anne Hathaway also changed out of her Valentino dress for something more manageable, though Emma Watson kept on her long Burberry. She's out on the social scene despite being in the middle of exams at Brown. Emma said, "I have just had one of my exams. It went pretty well, which is good, two left.” Bar Refaeli, meanwhile, brought her girlfriends and not Leonardo DiCaprio along.

Gwen Stefani and Gavin Rossdale stuck together, and Robert Pattinson's Remember Me costar, Emilie de Ravin, was surrounded by pals. Glee's Matthew Morrison headed to the Standard with Emmy Rossum hot on his heels, though once inside he was busy getting down with model Natasha Poly. Alexander Wang stayed close to Zoe Kravitz after they posed together on the red carpet, and Jessica Alba brought her husband Cash Warren. Naomi Campbell was all smiles in her fancy car after her episode on Oprah aired earlier in the day exploring her dark side. It was a huge night for fashion in the Big Apple — make sure to check out all of the style and beauty news!

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Images include: Kate Bosworth, Kate Hudson, Stella McCartney, Diane Kruger, Joshua Jackson, Bar Refaeli, Liv Tyler, Gwen Stefani, Gavin Rossdale, Kiefer Sutherland, Kate Bosworth, Liev Schreiber, Naomi Watts, Edward Norton, Kristen Bell, Joy Bryant, Ben Stiller, Emma Roberts, Daniel Craig, Satsuki Mitchell, Emmy Rossum, Ivanka Trump, Matthew Morrison, Hugh Dancy, Claire Danes, January Jones, Alessandra Ambrosio, Alexander Wang, Zoe Kravitz, Anna Wintour, Amber Walletta, MIA, Benjamin Bronfman, Elizabeth Banks, Tom Ford, Emma Watson, Emilie de Ravin, Jessica Alba, Cash Warren, Eva Longoria, Rosario Dawson, Michael Kors, Brooke Shields, Anne Hathaway, Blake Lively, Chloe Sevigny, Katy Perry, Naomi Campbell, Vladimir Doronin, Marion Cotillard