Andy Cohen accidentally reveals Kyle Richards’ secret plastic surgery

What a boob.

Andy Cohen accidentally revealed Wednesday that Kyle Richards underwent plastic surgery three weeks ago.

“How’s the breast reduction working out?” the Bravo producer, 54, innocently asked on “Watch What Happens Live with Andy Cohen.”

“Oh, thank you for letting everyone know, Andy, thank you,” the “Real Housewives of Beverly Hills” star, 53, sarcastically responded.

Realizing he had outed Richards, a visibly shocked Cohen covered his mouth.

“Oh! Oh, my God. I thought you’ve talked about it,” he said, to which the reality star curtly responded, “Never talked about it.”

Andy Cohen mistakingly revealed that Kyle Richards had a breast reduction.Watch What Happens Live with And

As the talk show host apologized repeatedly, Richards ultimately let him off the hook and confirmed that she did undergo the procedure.

“I had a breast reduction surgery,” she told viewers. “I never had implants. I had double Ds, no implants. I still don’t have implants.

“But I went in and said, ‘I want smaller boobs. I don’t ever want to wear a bra ever again in my life,’ and here I am.”

The “Halloween” actress then adjusted her strapless dress, noting, “You can’t really tell because they’re still swollen … but I will never wear a bra ever again. Ever. Ever.”

Richards told Cohen that all was forgiven after the slip-up.NBCU Photo Bank via Getty Images

Cohen responded with yet another apology and complimented Richards’ new frame.

“They look great,” he said. “I apologize. I am so sorry. I didn’t realize. … But by the way, that’s not embarrassing.”

The “Real Housewives of Beverly Hills” star said she used to wear a size double D bra.Getty Images for MTV

Richards assured the Emmy winner that his admission was “fine,” adding, “It’s OK, Andy. I love you.”

The “Little House on the Prairie” alum went on to clarify that she has always been honest about the cosmetic surgery she has undergone over the years.

“I have never lied about anything I’ve done, and I never ever will, just so you guys know,” she said. “You guys think I did my face. I really did not. I will tell you everything. I had a breast reduction three weeks ago. There’s a little bruise hidden over here.”

While Richards can take other peoples’ secrets “to the grave,” she explained that she “can’t keep a secret about [herself].”