EXCLUSIVE: One of the world’s biggest stars already is set to appear a film for mini-studio STX, and now his agent stxPhilip Button is joining the company too. I’ve learned that superstar Jackie Chan is leaving WME and will continue to be managed by Button but go agentless for the time being. Button’s title at STX will be EVP International Production and Management, focused on building out business in Asia and Latin America. He will report directly to STX CEO Bob Simonds. It is unclear if in what or any capacity Chan will align himself formally with STX.

Both longtime members of the WME family, Chan and Button will be leaving the agency imminently. Chan essentially was Button’s sole major client at WME, and I’ve heard that everyone is parting as friends.

The martial arts icon is set to star in STX’s untitled film that had been known as The Foreigner. STX Entertainment has been bulking up lately, with hires including Kathy Savitt joining the company today from Yahoo as President of Digital and QED’s John Friedberg singing on as President of International Sales in July. It also has a deal for the next film from the Jim Henson Company.

Back in April, China’s largest privately held film firm, Huayi Brothers Media Corp made a three-year deal with STX Entertainment for a slate of 12-15 films a year. It’s structured as a revolving line of credit estimated at upward of $1 billion for movies to be co-produced and distributed with Huayi. Securing Chan is a coup for STX as he remains a megastar in China.

Chan next stars in the action comedy Skiptrace and toon sequel Kung Fu Panda 3,

Erik Pedersen contributed to this report.