It was also revealed by a spokesman for Mariah, Cindy Berger. Mariah had just given birth at 12:07 local time, at an undisclosed hospital in Los Angeles, United States.
"The baby girl was born first, weighing 2.35kg and 45.72cm long. Then the next baby boy with the weight of 2.44kg and 48.26cm long, "said Cindy, Sunday (30/04/2011).
Meanwhile, Nick Cannon expressed his happiness was through personal Twitter account. He said the twins birth is a wedding anniversary gift that is extraordinary from his wife.
"My wife gave me a birthday present has a very unusual wedding anniversary gift," he said through his twitter account.
Previously, Nick was very nervous when he realized Mariah will soon give birth. He brought his wife was with Rolls-Royce Panthom to the hospital.
Until now, Mariah and Nick have not given name of her twins. The couple are now flooded with congratulations from friends and also from the fans around the world through social networking accounts belong to them.