Jack Antonoff has babies on his brain. The lead guitarist of the indie rock band fun., who has been dating Girls star Lena Dunham since 2012, revealed his desire to have children in an interview with New York magazine while opening up about his relationship with the 28-year-old actress, who indeed seems to be his perfect match. Dunham and Antonoff met on a blind date after they were set up by the musician’s good friend, comedian Mike Birbiglia.