Bill Shorten hopes Arnold Schwarzenegger can add some muscle to Labor's push for action on climate change.
The former California governor and Hollywood star is in Melbourne this weekend for the Arnold Classic, an annual mutli-sport festival which features body builders.
Schwarzenegger and the opposition leader will meet on the sidelines of the kids expo on Saturday.
Mr Shorten praised Schwarzenegger's track record in the fight against carbon pollution.
"Anyone who's seen his work knows he's a straight-shooter determined to save the planet," Mr Shorten said.
"He sticks to his principles, even when the going gets tough."
California's economy is the sixth largest in the world - a feat achieved in part because it is an attractive and stable environment for renewable energy investment, Mr Shorten said.
The Turnbull government has repeatedly attacked Labor over its policy to establish a target of 50 per cent renewable energy by 2030.