Jack Michael Antonoff (born March 31, 1984) is an American singer, multi-instrumentalist, songwriter and record producer. Antonoff is the lead singer of indie pop band Bleachers, and a guitarist and drummer in the indie rock band Fun. He was previously the lead singer of the indie rock band Steel Train. Aside from his work with Bleachers and Fun, Antonoff has worked as a songwriter and record producer with various artists, including Taylor Swift, Lorde, St. Vincent, Lana Del Rey, Kevin Abstract, Carly Rae Jepsen, The Chicks, and Troye Sivan.
Antonoff has been nominated for a Golden Globe Award and won five Grammy Awards: two for his work with Fun, two for production on Taylor Swift's albums 1989 and Folklore, and one with St. Vincent for writing the title track on Masseduction. He also started his own music festival, Shadow of The City, which takes place annually in New Jersey.