"Ain't No Doubt" is a song by English actor and singer-songwriter Jimmy Nail, released on 29 June 1992 by EastWest Records as the first single from his second album, Growing Up in Public (1992). Composed by Nail with Guy Pratt, Danny Schogger, and Charlie Dore, the song features additional vocals from Sylvia Mason-James. Six years after his debut album, Nail revived his singing career during the success of his television drama series Spender, where he played the titular character. "Ain't No Doubt" reached number one in both Ireland and the United Kingdom, and was a top-10 hit in Australia, Belgium, Denmark, the Netherlands, New Zealand and Sweden.
