It may have been an emotional day for Emma Watson, but she was still ready to get her party on after the premiere of "Harry Potter and the Deathly Hallows - Part 2."

Watson, who was seen tearing up on the red carpet and after the movie, pulled herself together for the movie's official after-party -- where she changed out of her Oscar de la Renta gown for a shorter, Elie Saab cocktail dress.

Also on hand for the bash were co-stars Rupert Grint, Tom Felton, Helena Bonham Carter, Bonnie Wright and, randomly, Emma Roberts.

Surprisingly, there was no sign of Harry himself, Daniel Radcliffe.

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