Zooey Deschanel, who just turned 29 this weekend, was at the Sundance Film Festival to promote her film “500 Days of Summer” with Joseph Gordon Levitt. The film is a romantic comedy about the two falling in love and the two actors spent the whole time gushing about the film and about each other.

Joseph told the LA Times: “They said I could play opposite Zooey [his co-star in 'Manic'],” he said. “She’s one of the greatest people alive today.”