Andy Cohen and “Real Housewives of New York City” alum Carole Radziwill squashed their years-long feud with a surprise “Watch What Happens Live” appearance.

Radziwill appeared on Cohen’s late-night talk show Monday as a surprise guest, shocking his other guests, Bowen Yang and Matt Rogers.

After the duo tried — but ultimately failed — to guess Cohen’s surprise guest for the evening, the famous doorbell rang.

“It’s Carole Radziwill!” Cohen, 57, shouted as the reality TV star emerged from backstage.

“She’s one of my favorites,” Rogers gushed as he hugged the former Bravolebrity.

Yang was just as “excited” to see Radziwill, whom he also embraced.

The former journalist then went in for a hug with Cohen, who announced that she was “making a triumphant return.”

After Radziwill, 61, took a seat opposite the Bravo exec, he asked with whom she still keeps up from her “RHONY” days.

“Dorinda [Medley] and I share a really good friend, so I do see her occasionally,” she replied, adding that she sees Heather Thomson “a couple times a year.”

“Other than that, I have’t seen anyone else in eight years. Although, I recently randomly bumped into Ramona [Singer] and Luann [de Lesseps] at the same party,” she shared.

The author said she “went right up to them” to chat, claiming that she “couldn’t remember” whether she and de Lesseps “hate each other.”

Radziwill also quipped that her conversation with Singer felt like they were “in a scene.”

Following her celebrated “WWHL” return, Radziwill took to Instagram to post a clip of her reveal, which she captioned, “The #RHONY Reunion you were waiting for….yes, that’s me. The mystery guest on WWHL.”

“Honestly it was so fun to be in that crazy clubhouse,” she continued, calling Cohen “incredible and fun and gracious with a smile ear to ear.”

She made sure to note, “Even though I’m famously NOT A HUGGER the hug was the best part. That’s all folks…..no other reunions or appearances but this one was worth all my nervousness & butterflies. 💋.”

Radziwill and Cohen fell out during the “RHONY” Season 10 reunion in 2018, which was her last before she left the since-rebooted series.

At the time, she accused the reunion moderator of siding with her bestie-turned-nemesis, Bethenny Frankel.

The pair went on to engage in some public spats before Cohen revealed in November 2024 that he and Radziwill had recently “reconnected.”

“It feels great,” he told People at the time, as Radziwill elaborated, “We both came to understand that our disagreements had everything to do with the high-pressure nature of the show and very little to do with our friendship, which proceeded it.”

She added that she and the TV host “are very much on the same page now,” noting that she’s “happy about that.”