Born in Cummins, South Australia, he studied at the South Australian Centre for the Performing Arts before making his break into television as a member of the Big Bite sketch comedy show and then became a regular presenter on Foxtel's The Comedy Channel.
[1] In 1999, Knight guested in an episode of the Australian soap opera Neighbours, followed by an appearance in police drama Blue Heelers.
In 2007, Knight was the host of the Australia heat of Last Comic Standing season 5 which aired on Fox8 and received an ASTRA Award nomination for Best Male Presenter in 2008.
Knight has regularly appeared on Today and has co hosted the morning show, Studio 10 on Channel 10.
In 2016, Knight was the co-host of the Channel 9 show Unreal Estate with Kate Langbroek.