In 2013 Hahn played her first leading role, in the comedy-drama film "Afternoon Delight," which was written and directed by Joey Soloway. The film premiered at the 2013 Sundance Film Festival. For her role, she was nominated for the Gotham Independent Film Award for Breakthrough Actor. Later that year Hahn appeared opposite Jennifer Aniston (her co-star in "Wanderlust") in the box-office hit "We're the Millers" and co-starred alongside Ben Stiller and Kristen Wiig in "The Secret Life of Walter Mitty." In 2014 she starred in the comedy film "Bad Words" alongside Jason Bateman, the ensemble comedy-drama "This Is Where I Leave You", and Peter Bogdanovich's "She's Funny That Way" alongside Owen Wilson.