"The only acting I was taught in South Auckland was pretending to be injured at rugby so they could get a faster player on the pitch; so if I can make it, anybody can."
Laga'aia said playing the Wizard would be emotional as it was a part previously performed by Kiwi actor Rob Guest, who died after suffering a stroke shortly after a matinee performance in 2008.
He added the Civic was also where he first saw Star Wars as a youngster in the 1970s.
The outspoken actor hit the headlines last year when he accused Australian network Channel 7 of axing him from TV soap Home and Away because of his ethnicity. He said he still stood by his comments and couldn't care less if he had lost any work offers.
"I have lasted a long time in this business because I have many strings to my bow and have a good career in kids' TV in Australia," he said.
"If I lose out on something, I just strum another bow. While I am back in New Zealand I wouldn't even mind a guest part on Shortland Street."