The "Twilight Saga" couple reportedly had a fun night as they danced together at one point during the gathering.
Stewart hung out with her co-star Amy Adams by a fire at the beginning of the party, while Pattinson chatted with other people nearby.
After the "Man of Steel" star left, they continued mingling with other guests separately before he joined her on the dance floor. They reportedly got playful with each other.
The "Cosmopolis" actor showed off his dance moves, whispered in her ear, and put his arm around her.