Ben Affleck was all smiles at the premiere of the revival of HBO’s “Project Greenlight.”

The actor was photographed laughing on the red carpet, dressed in a blue suit with his wedding ring on his finger, outside the Ace Hotel theater in Los Angeles Monday night.

Even co-producer and friend Matt Damon noticed his mood.

“He’s got a big smile on his face tonight,” Damon told reporters on the red carpet, according to Us Weekly.

Affleck’s wedding ring has been on and off since he announced his split from wife Jennifer Garner back in June after 10 years of marriage. Rumors have since swirled that the 42-year-old Oscar winner had been cheating on Garner with their children’s nanny, Christine Ouzounian, for months before the breakup news.

His rep said in July that the gossip is unfounded. “People’s lives are at stake,” the rep said to Gossip Cop, “and they chose to try to sell more magazines” with “lies.”

Also on HuffPost:

For a constant stream of entertainment news and discussion, follow HuffPost Entertainment on Viber.

– This feed and its contents are the property of The Huffington Post, and use is subject to our terms. It may be used for personal consumption, but may not be distributed on a website.