Campbell formerly starred in the children's television show Snobs with Indiana Evans. He also appeared briefly in Water Rats as a police officer. Campbell is also the only Home and Away actor to make an appearance on the show's first podcast, Baycast.
Campbell was a contestant in series six of Dancing with the Stars, which premiered on 20 February 2007. He made it to the semi-final on 24 April, maintaining impressive scores throughout the series. He left Home and Away on 5 October 2007 after filming his final scenes.
In 2008, he cut ties with the Seven Network and transferred to the Nine Network to host a revived version of Wheel of Fortune titled Million Dollar Wheel of Fortune which premiered on May 26 2008. However just weeks after the premiere of Million Dollar Wheel of Fortune was aired on Australian TV, on June 27 2008 it was announced that the show was to be cancelled. He will take over Joey Fatone's hosting duties for the second season of The Singing Bee.
In late 2007, rumours of Campbell dating singer Anthony Callea surfaced in the media. During an interview, Campbell confirmed that he is gay, but denied romantic involvement with Callea. However, on February 11, 2008, during an appearance on Vega 91.5fm's breakfast program, Campbell acknowledged that he and Callea were "an item."