Lena Dunham & Jack Antonoff - Grammys 2013 Couple!

Lena Dunham and Jack Antonoff pose for a pic during a commercial break at the 2013 Grammy Awards on Sunday (February 10) at the Staples Center in Los Angeles.

The 26-year-old Girls actress stepped out to support her boyfriend, who is a member of the band Fun. and picked up two awards during the show!

PHOTOS: Check out the latest pics of Lena Dunham

Lena was seen mingling with a bunch of other guests during the show, including Taylor Swift, Katy Perry, Solange Knowles, and her fellow Girls actress Allison Williams.

FYI: Lena is wearing a Peter Jensen dress, Brian Atwood shoes, and Neil Lane for Forevermark jewelry.