Lena Dunham's "Really Hot" Parents Inspired Her to Work Out More: I Looked "Like a Bag of Trash" Next to Them!

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!
The 28-year-old said, "I wanted to do it because I was losing by breath when I walked up like that stair."