Charlie Day says It's Always Sunny in Philadelphia is aiming for a record-breaking 15 seasons -- Glenn Howerton might return

TheWrap

Day tells The Wrap that “fans should feel hopeful” of Howerton returning for Season 13. He says he and fellow Sunny stars are hoping to break the record for a live-action sitcom. “You definitely get Season 13, which we’re making right now, and Season 14, which we’re contracted to do, and then beyond that, it’ll be up to FX,” he says. “But I think 15 is the record for a comedy, so I imagine we’ll all want to hold the record for the longest-running comedy in America. Fifteen would be the record for the longest live-action comedy, so we’ll probably try and break that record if we can.”