Youngest member of the Jonas Brothers, with Kevin and Joe.
He was performing on Broadway before he was eight.
He suffers Type I diabetes, and was in the movies Camp Rock one & two.
He began dating singer and actress Miley Cyrus in June 2006 until December 2007, then began dating actress and singer Delta Goodrem from May 2011 through February 2012.
He is the older brother of Frankie Jonas.