Geoff Ammer is leaving his post as president of worldwide marketing at Relativity, effective immediately.

Ammer, who previously held key marketing positions at Sony, Disney and Revolution, hands over the reins to Overture’s president of worldwide marketing and distribution Peter Adee.

Sources said the resignation was amicable and that Ammer had been considering a new challenge for some time. The development follows the recent acquisition by Relativity Media of Overture’s marketing and distribution operations.

“We are very grateful for Geoffrey’s creative vision and contributions to Relativity’s successes,” Relativity CEO Ryan Kavanaugh said. “We wish him the best in his future business endeavours.”

“It has been my pleasure to work with such a talented team of film-makers and staff during my time at Relativity,” Ammer said. “I wish them great success with their upcoming films.