That's the message posted on Britney Spears' official Web site Thursday morning.
"We are ecstatic to announce the birth of our son," a message on the site says. "Everyone is healthy, happy and doing wonderful."
The baby was born Wednesday by Caesarean section at the Santa Monica UCLA Medical Center in California, the magazine Us Weekly reported. No other details were available.
Telephone messages left for the pop star's New York publicist by The Associated Press weren't immediately returned.
It is the first child for the 23-year-old pop star and her husband, Kevin Federline. Federline, 27, has two children with ex-girlfriend Shar Jackson.
Spears, 23, and Federline had announced the pregnancy in April.
Reports suggest that they will call the baby either London Preston or Preston Michael. Her top name for a girl was Addison Shye.
Last month, the singer revealed: "I have a feeling I'm going to have an operation. I don't know why but I hope so.
"My mum said giving birth was the most excruciating thing she's ever gone through in her life. So if a caesarian doesn't happen, I'll be like, 'Epidural, please'."
The Toxic star, who has sold more than 60 million albums, has made no secret of her wish to start a family and has said she can see herself as a mother.
Shortly after tying the knot in a private ceremony last September, she announced she would be taking a break from music to enjoy married life and focus on motherhood.