Later on, the 28-year-old actress joined her co-stars Melanie Lynskey, Joe Swanberg and Mark Webber for the Next Generation Filmmaker Series bash afterwards.
Inside, Anna and Joe, who play siblings in the flick, started a dance party and got the whole room going until the early morning.
Earlier, Anna was spotted at a party for her other movie, The Voices.
FYI: Joe is wearing head to toe Dockers Alpha Collection.
10+ pics inside of Anna Kendrick…