The news comes just days after ET confirmed Mulaney's split from his wife of six years.
John Mulaney and Olivia Munn are dating, according to multiple reports. ET has reached out to reps for Mulaney and Munn for comment.
The news comes days after ET confirmed on Monday that Mulaney and his wife, Anna Marie Tendler, had split after six years of marriage. "I am heartbroken that John has decided to end our marriage," Tendler said in a statement to Page Six at the time. "I wish him support and success as he continues his recovery."
Monday also marked Mulaney's first show back since his stint in rehab. He performed a stand-up set at the City Winery in New York City.
Mulaney checked himself into rehab for 60 days last December after struggling with alcohol and drug abuse, and according to several fans on Twitter who claimed to have attended Monday night's event, Mulaney addressed his time in rehab in his new set.
Munn -- whose last public relationship was with Philadelphia Fusion president Tucker Roberts before their breakup in 2019 -- tweeted her support for Mulaney after his relapse last year.
"Sending SO MUCH love and support to John Mulaney," she tweeted at the time. "You got this."
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