Bonner's first professional stage acting job was in 1961, aged 18. His first major role was as helicopter pilot Jerry King on the television series Skippy.
Bonner recorded a cover version of the Bee Gees song "Wine and Women" in 1968. He later appeared with Barry Gibb on an episode of Bandstand. Later in his career Bonner appeared in several stage musicals including Annie Get Your Gun and How to Succeed in Business Without Really Trying.
Notable film roles include Eyewitness (1970), You Can't Win 'Em All (1970), Creatures the World Forgot (1971), Inn of the Damned (1975), The Mango Tree (1977), Money Movers (1978), The Man from Snowy River (1982), The Highest Honor (1983), Quigley Down Under (1990), Dead Sleep (1992), Hurricane Smith (1992) and Liquid Bridge (2003). He also twice portrayed Australian World War I soldier Murray Bourchier, to whom he bears a remarkable likeness, in the 1987 film The Lighthorsemen and a 1993 episode of The Young Indiana Jones Chronicles (where footage from The Lighthorsemen was inserted into the episode).
Bonner was married to Australian Actress and model Nola Clark from 1972 to 1992. They had three daughters. One daughter Chelsea Bonner is the owner and Director of the Plus-size model agency BELLA model management.
Bonner also starred in the 1985 TV mini-series Anzacs alongside Paul Hogan, Jon Blake, Andrew Clarke and Megan Williams. Bonner played Lieutenant (later Captain) Harold Armstrong, commanding officer of the 8th Battalion (Australia) of the First Australian Imperial Force in 1914 and their journey in World War I through Gallipoli in 1915, and then on the Western Front in Belgium and France. The series was a huge rating success when it aired on the Nine Network.
Bonner also does advertising work, such as the part of veteran burger naming expert Ken Thomas in a 2007 McDonald's ad campaign.
In September 2008 he sued Fauna Productions Pty Ltd, the production company for Skippy the Bush Kangaroo, seeking residuals from merchandising and DVD sales.
In June 2013 Tony is currently in talks of collaborating with actors Billy White and Tyler De Nawi on an Australian crime noir film titled "HUCK".
