How do actors from Australia manage to get to Hollywood?

take eric bana for example. he is a hollywood star but he's australian and grew up in melbourne, australia. how did he manage to become a hollywood star when he was in a different country? Did he move to Hollywood to pursuit an acting career or did he somehow gain Hollywood's attention and they invited him to join them?|||well, some, like kylie minogue, delta goodrem, bec cartwright and heaps of others, go on tv soapies like neighbours and home and away. others just have natural talent and go through talent agencies i guess...|||move to the usa