Notice Lena Dunham looking a little different lately? The Girls star has been working out!
It wasn't the pressures of Hollywood that inspired this physical fitness kick, though—as Lena revealed on Thursday's Late Show With David Letterman, her "really hot" mom and dad are responsible for her recent shape-up!
"I wanted to do it because I was losing by breath when I walked up like that stair," said the 28-year-old multi-hyphenate, pointing to a small step by the stage. "And also, [because of] both my parents [Caroll Dunham and Laurie Simmons], who are 65...they're both real exercise fiends, and it started in the last five years..."