Lachlan Buchanan (born 25 April 1987) is an Australian actor. He is the younger brother of well-known Australian stage and screen actor Andrew Buchanan, his film credits include Behaving Badly, Newcastle and Some Freaks. Lachlan Buchanan (born 25 April 1987) is an Australian actor. He is the younger brother of well-known Australian stage and screen actor Andrew Buchanan, his film credits include Behaving Badly, Newcastle and Some Freaks.