Dave Grohl called his wife Jordyn Blum his “future ex-wife” long before he admitted to having an affair and fathering a child “outside” their marriage.

In fact, the 55-year-old Foo Fighters frontman gave Blum, 48, that dubious nickname the night they met at Los Angeles whiskey bar Sunset Marquis in 2001.

The former Nirvana drummer was at a bar with his late bandmate Taylor Hawkins when a woman who had been flirting with him introduced her friend Blum to Grohl.

The Grammy winner immediately thought she was out of his league. “Taylor was the eye-catcher,” Grohl recalled in a 2007 interview with the now-defunct music publication Q magazine.

“I’m wearing Vans sneakers, no socks, dirty shorts and a dirty T-shirt, surrounded by beautiful Hollywood.”

When he saw Blum, he thought, ‘Oh my God. No chance!’

“So I just drink and act like an ass,” he continued. “And by the end of the night I was pissed off and I was staring at her and thinking, ‘You’re my future ex-wife,'” he said, laughing uproariously, according to the magazine.

“So she gave me her number: ‘Jordyn, your future ex-wife.’”

Two years later, on August 2, 2003, Grohl married the former model and MTV producer in a ceremony at their LA home.

The couple have three daughters: Violet Maye, 18, Harper, 15, and Ophelia, 10.

Grohl admitted in a statement on his Instagram account on Tuesday that he had an extramarital affair and fathered a daughter “outside” of his marriage.

“I recently became the father of a new baby daughter, born out of wedlock,” Grohl revealed. “I plan to be a loving and supportive parent to her. I love my wife and my children, and I am doing everything in my power to earn their trust and forgiveness.”

He added: “We are grateful for your attention to all the children involved as we move forward together.”

A spokesperson for Grohl told The Post there was no further comment from the musician.