Damon: 'I'm not playing dad to girlfriend's child'

Matt Damon is great friends with his girlfriend Luciana Barroso's five-year-old daughter, but insists he is not taking over the "daddy role".

The 33-year-old star brought aspiring interior designer Barroso, her mother and Barroso's daughter to Sydney last weekend for the Australian premiere of The Bourne Supremacy.