Copy to Clipboard John Mulaney and Annamarie Tendler (Getty Images) Looks like things got a little serious for stand-up comedian and actor John Mulaney as he has checked into rehab for a month for alcohol and cocaine abuse. A source confirmed the big news to Page Six about the 38-year-old writer and producer checking into the Pennsylvania rehab facility this past weekend. If the exclusive gossip reported by Page Six is to be believed, “John’s friends and family are happy that he’s finally getting some help and focusing on his health. His fans know he’s struggled in the past with sobriety, he has talked about it openly. Unfortunately, he has struggled again during the pandemic. He’s on board with his recovery, he’s not fighting against rehab."