John Ewart (26 February 1928 – 8 March 1994) was an Australian Film Institute award winning actor. Ewart was born in Melbourne. He began his acting career when he was cast at the age of four in a radio production of Snow White. At the age of 18 he made his film debut in the lead role of Mickey O'Riordan in Charles Chauvel's production of Sons of Matthew. Ewart appeared in hundreds of Australian radio, theatre, film and television productions. To many thousands of Australians who grew up in the '50s and '60s he will be remembered as 'Jimmy', boyishly cheeky co-presenter of the ABC Radio Children's Session, and in the title role of its long-running Muddle-Headed Wombat serial. He was well known for his role in film Sunday Too Far Away, his ongoing role in the Australian TV series The Restless Years in 1980 and 1981, and his lead role opposite a young Nicole Kidman in Bush Christmas.