Andy Cohen has been flooded with congratulations from his famous friends following the birth of his baby boy.

Andy Cohen

Andy Cohen

The 50-year-old TV star welcomed his first child Benjamin Allen Cohen via surrogate on Monday (04.02.19), and one of his closest pals, 41-year-old singer John Mayer. took to social media to share a photo of a pair of baby moccasins he had previously gifted Cohen.

The 'New Light ' singer captioned the photo: "Congratulations Andy!"

Andy quickly commented, "I love you. I can't wait for you to meet him tomorrow."

The musician wasn't the only person to comment on the new arrival as Sarah Jessica Parker claimed February 4 will "never be the same" thanks to the infant, who she proclaimed to be "madly in love" with.

The 'Sex and the City' star said: "February 4th will never be the same. We are already madly in love. Welcome Benjamin Allen Cohen we've got big plans for you."

Mariah Carey wrote: "Congratulations and Mazel Tov, Andy!! Can't wait to meet Benjamin, he's very lucky to have you as a dad."

Anna Faris quipped: "Awwwwww so cute!!!!! Congrats!!! Are you ready for breastfeeding? It's harder than it looks."

Naomi Campbell gushed: "Congratulations @bravoandy you are going to be the most amazing daddy to your bundle of joy, Benjamin!!!!"

Some 'Real Housewives' stars also commented with Lisa Rinna posing: "Welcome to the world baby Benjamin!!!!" and Kyle Richards stating: "I cannot stop crying."

Pink commented:"Congratulations a million times."

Taylor Lautner joked: "Babysitter" with an emoji of a man volunteering by raising his hand as well as Gabrielle Union - who became a mother to Kaavia James Union Wade two months ago - writing: "Congrats!!!!!! That skin to skin action is the best!!"

The 'Watch What Happens Live' host took to Instagram to announce his son had been born on Monday (04.02.19).

Andy posted a black-and-white photograph of him cradling the tot and wrote: "WOW! This is my son, Benjamin Allen Cohen. He is 9 lbs 2 ounces !! 20 inches !! Born at 6:35 pm, PT

"He is named after my grandfather Ben Allen. I'm in love. And speechless. And eternally grateful to an incredible surrogate. And I'm a dad. Wow [rainbow emoji] (sic)"