Kristin Cavallari’s lips are sealed.

The reality star admitted to a steamy Glen Powell hookup on her “Honestly Cavallari: The Headline Tour” premiere Wednesday — but refused to discuss it on “Watch What Happens Live.”

The “Hills” alum’s BFF, Justin Anderson, called her out over the dalliance during a live “Let’s Be Honest” podcast taping in March.

The hairstylist acknowledged that Cavallari, 38, “would be so mad” at him for spilling the beans.

Nevertheless, Anderson revealed, “She recently went on a date with … Glen Powell. And I wanted it to happen so badly! ‘Top Gun,’ bitch!”

Cavallari, seemingly shocked, shouted her pal’s name.

“OK, I have to go on record,” the “Laguna Beach” alum added. “When this comes out, I had nothing to f–king do with it!”

In a subsequent confessional, Anderson explained that they had been “partying in Greece” when, as Cavallari chimed in, Powell “literally ran into” her.

“You guys had a really fun night together,” Anderson said.

When Cavallari was quick to clarify she “never f–ked” the actor, Anderson interjected to say they “dry humped” — which she confirmed.

The “Very Cavallari” alum was asked to rate Powell’s kissing skills — and, when she wouldn’t answer, his dry-humping skills — on “WWHL” Wednesday night, but she played coy.

“Did I say [we did] that? Funny how that happens,” Cavallari told host Andy Cohen. “Maybe we didn’t kiss. It’s possible. I’m not answering that question.”

Powell’s rep did not immediately respond to Page Six’s request for comment.

Elsewhere in the episode, the Uncommon James creator set the record straight on romance rumors she sparked with Craig Conover in 2021.

Cavallari, who stunned in a plunging black dress, confirmed that she dated the “Southern Charm” star, 36, for “two seconds” before his three-year relationship with Paige DeSorbo.

She broke down the timeline, explaining that she asked Conover to “just be friends” after seeing a picture of him and the “Summer House” star, 32, looking “sort of together.”

Cavallari has a star-studded dating roster, with the “Let’s Be Honest” host recently being linked to country singer Morgan Wallen and athlete Nate Thompson.

She has also been married to ex-husband Jay Cutler, with whom she shares three children.