Speaking to Wendy Williams on The Wendy Williams Show, Cohen hesitantly admitted to the kiss during a game of 'Plead The Fifth', which he plays with guests on his own show.
'Plead the Fifth' features Cohen asking celebrities three revealing questions. Guests have the right to 'plead the fifth' to avoid answering one question, but must then answer the other two.
Cohen - who also fronts the Real Housewives reunion shows - had been asked which celebrity people would be surprised to hear he had made out with.
During his appearance to promote his new book Most Talkative, he also confessed that he once duped Oprah Winfrey into doing an interview she had already turned down when he worked at CBS news in 1993 – which resulted in a call from the media mogul.
Cohen recalled: "So, all of a sudden I turn into this huge fan. 'Oh my God, Oprah's calling me!' - like I didn't just meet her and play a trick on her."
Watch Andy Cohen on The Wendy Williams Show below: