John Peter FarnhamAO (born 1 July 1949) is an English-born Australian rock/soft rock singer. Farnham was a teen pop idol from 1967 until 1979, billed then as Johnny Farnham, but has since forged a career as an adult contemporary singer. His career has mostly been as a solo artist, although he replaced Glenn Shorrock as lead singer of Little River Band from 1982 to 1985.

In September 1986, his solo single ‘You’re the Voice’ peaked at No. 1 on the Australian singles charts. The associated album, Whispering Jack, held the No. 1 position for a total of 25 weeks and is the 2nd-highest-selling album in Australian history. Both the single and the album had top-ten success internationally, including No. 1 in Sweden.