Irwin Thomas (born 6 January 1971) is an Australian singer and guitarist who was formerly known as Jack Jones, as the lead vocalist in the 1990s Australian band Southern Sons. Jones toured with John Farnham during his Chain Reaction tour in 1990/91 as Bass Guitarist and was also featured on the album of the same name
Jones was previously married to New Zealand born Australian actress Rebecca Gibney during 1992-95, which ended in divorce. Since reverting to his birth name, of Irwin Thomas he has released music as a solo artist, first for BMG and later as an independent artist. Since 2004 he has also been involved with a Melbourne band called Electric Mary, and he is also currently involved in a band called She Said Yes, led by Tania Doko, the former lead singer of Bachelor Girl.