Wilson was clearly enjoying her time with the High School Musical star. "Hanging with main man Zac, freestyle rapping, etc.," she wrote during halftime.
The Bridesmaids scene stealer also posted a picture of her Pitch Perfect costar Skylar Astin, 25, hanging out with Efron. "I had two hot dogs at half time!" Wilson joked in the caption. "Wait, that wasn't supposed to be rude."