Nick Cannon welcomed his twelfth child on Dec. 14.

Sean "Diddy" Combs surprised the internet in a Dec. 10 Twitter post with news he welcomed a new addition.

"Bachelor in Paradise" alum Tia Booth and her fiancé Taylor Mock announced a new addition to their family Wednesday.

Anthony Rapp announced on Twitter that he and his fiancé Ken Ithiphol welcomed their first child together, a son named Rai.

Singer Jhené Aiko and rapper Big Sean announced on their respective Instagrams that they welcomed their first child together.

Heidi Montag and her husband Spencer Pratt welcomed their second child together on Nov. 17.

Jesse Tyler Ferguson and his husband Justin Mikita are parents of two! The couple announced the addition of their second child on Nov. 15.

Rebel Wilson has joined the "mums" club! The "Senior Year" actress shared the news Nov. 7 on Instagram, annoucing the arrival of her first child.

Congratulations are in order for "Ridiculousness" co-host Chanel West Coast! She shared via her Instagram Story on Nov. 2.

For "This Is Us" star Chris Sullivan and wife Rachel, it takes two to make a thing go right, with the couple announcing the birth of their second child