Looks likeBrad PittandEllen DeGenereshave an ex in common — but they’re keeping their lips sealed on who it is.

The actor, 55, made a surprise appearance onFriday’s episodeofThe Ellen DeGeneres Show, jokingly trying to blend in as an audience member andEllensuperfan before being brought onstage for an interview.

As the two started talking, DeGeneres, 61, asked if Pitt remembered where they met.

“I remember aMelissa Etheridgepool party, where I think you were hitting on my girlfriend,” Pitt recalled, adding that it was in the “late ’80s, early ’90s.”

“Was I hitting on your girlfriend, really?” DeGeneres responded, laughing.

“I think so. I was flattered,” Pitt replied.

“I actually sense that I have dated another one of your girlfriends,” DeGeneres revealed, though she didn’t disclose the identity of the special someone onstage. “We’ll talk about that later.”

“After the show,” Pitt agreed.

Michael Rozman/Warner Bros.

Ellen DeGeneres Reveals She Dated Brad Pitt’s Ex-Girlfriend

Though DeGeneres didn’t reveal the identity of her ex-girlfriend, the talk show host recentlycelebrated her 11th wedding anniversarywith wifePortia de Rossi, and in December, the two will mark their 16-year dating anniversary.

“Happy anniversary, Portia. 11 years,” DeGeneres wrote alongside the smiling snap, captured at their nuptials.

“My favorite number with my favorite person,” she added.

Pitt, meanwhile, marriedAngelina Joliein 2014, following his divorce years prior fromJennifer Aniston. Jolie and Pitt split two years later, and share six children.

Since the breakup, the actor has “worked very hard on himself to be a better, healthier person and to be the best dad possible,” a sourcerecently told PEOPLE.

“These were always his priorities. That his career is going well is a happy bonus that he is thrilled about,” the source continued.

Pitt is having a busy year, with rave reviews for his performance in this summer’sOnce Upon a Time … in Hollywoodand the upcoming space dramaAd Astra.

Between hislatest movie’s box office successand Pitt’s personal strides, he’s “really found his happiness again,” the source added. “He is back and very excited about life. And it’s well-deserved.”

Pitt can next be seen inAd Astra, which hits theaters Sept. 20.

source: people.com