As well as being a group member, touring and session musician for acts such as Ringo Starr, Hart has composed film scores and is a record producer.Hart began his association with British rock band Supertramp in 1986, initially as a studio and touring musician, taking on the vocal and keyboard parts previously done by Roger Hodgson.[3] He stayed with the band after founding drummer Paul Hester left,[3] and is seen along with the group's founders Neil Finn and Nick Seymour in the photographs from the sleeve for Recurring Dream, the 1996 greatest hits album.Hart has scored the motion pictures Life Among the Cannibals (1996) and Mockingbird Don't Sing (2001) both directed by Harry Bromley Davenport.In January 2007, Neil Finn announced the reformation of Crowded House with Hart, Nick Seymour, and a new drummer, Matt Sherrod (ex-Beck).