The music executive and his wife, Mexican singer Thalia, welcomed a son into the world on Saturday (25.06.11) in New York City.
The couple have named the tot Matthew, and he weighed a healthy seven pounds, 14 ounces
A representative for the overjoyed pair said: "All are well and they couldn`t be happier."
Thalia also announced the happy news on her twitter page, writing: "Thalia, Tommy, and Sabrina joyfully announce the birth of Matthew Alejandro Mottola."
She later added in another tweet: "Good night! Matteo Alejandro and Mama are going to sleep! Thank you for your love and light!"
Tommy, 61, and Thalia, 39, have been married for over ten years and already have a three-year-old daughter Sabrina together.
The music mogul was previously married to Mariah Carey. The pair tied the knot in June 1993 shortly after he signed her to the music label CBS Records. They separated just three years later and divorced in 1998.
Mariah recently became a mother for the first time when she gave birth to twins Monroe and Moroccan Scott on April 30, her first children with husband Nick Cannon.