Janeane Garofalo: Whoops, I was married for 20 years ...

Janeane Garofalo has been secretly married for 20 years — only she and the groom weren’t actually in on the secret until he decided he wanted to marry someone else.

The comic admitted her secret past on Saturday at a New York Comedy Festival reunion for “The Ben Stiller Show,” according to the New York Post.

“We got married drunk in Vegas,” she said of herself and Rob Cohen, who was a writer on “Stiller” when they dated for a year in the ‘90s and is now a producer on “The Big Bang Theory.” She was an actress on the show.

One wasted night, they got in a cab and got married at a drive-through chapel. Little did they know, Garofalo said, the marriage was for real.

“[We thought] you have to go down to the courthouse and sign papers and stuff,” she said, “so who knew?”

Cohen’s lawyer apparently dug up the dish in preparation for his client’s wedding to another woman. The split was notarized at a bank in New York City just a half-hour before the panel discussion on Saturday, Garofalo said.

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