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JACKSON, Miss. - Jamie Lynn Spears gave birth to a baby girl Thursday morning at a south Mississippi hospital, according to a friend of the Spears family. The friend, who asked not to be identified because the family had not yet announced the baby’s birth, told The Associated Press that the baby was named Maddie Briann and weighed 7 pounds, 11 ounces.

The 17-year-old Jamie Lynn was the star of Nickelodeon’s “Zoey 101,” a sitcom about prep school friends, and is the younger sister of pop star Britney Spears. The Spears family announced in December that Jamie Lynn was pregnant. The father is Casey Aldridge, a pipe-layer from Liberty, Miss. The couple is not married but announced an engagement several months ago.

Ellen Brannan, spokeswoman for Southwest Mississippi Regional Medical Center, in McComb, would not give out any details. “We understand everybody’s interested, but we don’t give out information on anyone. Everyone’s entitled to their privacy,” she said.

The younger Spears lives near Liberty with Aldridge, 19, and has been seen around the small south Mississippi town often as her pregnancy became more apparent. Her family owns a home across the state line in Kentwood, La.

Spears announced her pregnancy through an article in OK! Magazine and was expected to receive a large payday for exclusive pictures of the newborn.

Nickelodeon issued a statement about the birth on Thursday, saying, “We wish her and her family well.” Nickelodeon spokeswoman Marianne Romano said that filming of the fourth and final season of “Zoey 101″ was completed last summer before Spears became pregnant.

Spears portrayed Zoey Brooks, a student at Pacific Coast Academy, a campus that had been an exclusive all-boys boarding school until Zoey and a handful of other girls arrived. At the end of the series, Zoey gets the boy — longtime crush Chase (Sean Flynn).

Although Britney Spears and Kevin Federline were in Las Vegas on Friday, the former couple managed to navigate the social scene without running into each other.

While Spears, 26, relaxed and sipped water in a cabana at the Cinevegas party at the Palms Place, Federline drank Jack Daniels at Strip House only a few miles away. And while Spears’s night ended early, her ex kept the party going past 3 a.m. at Prive Las Vegas, where he was honored as “Father of the Year”.

Looking dapper in a black suit and red tie, Federline, 30, arrived at Prive just before 1 a.m. with an entourage of about 30, including his divorce lawyer Mark Vincent Kaplan. At a VIP table, Federline nodded his head to several hip-hop songs and paid little attention to the risqué fashion show that was happening on top of the club’s deejay booth.

At around 2:30 am, Federline headed to the back kitchen of the club, where he was presented with a “Father of the Year” trophy out of the public eye, an honor he told reporters “surprised” him.

Spears, celebrating Father’s Day weekend with her dad Jamie, ate fresh fruit and sunned herself for three hours Friday at the newly opened Palms Place pool. Later, she began her night with a low-key dinner with a friend and a member of her security staff at the Palms restaurant Nove, where she feasted on an artichoke dish.

After donning a short black cocktail dress, the singer attended the Cinevegas party with her father, Palms hotel owner George Maloof and his business associate Jon Gray. In a private cabana, Spears showed little emotion as she sipped water and chatted with her group for two hours.

Spears is reportedly staying the weekend in Las Vegas, while Federline is expected to head back to Los Angeles on Saturday to spend Father’s Day with his children, including his sons with Spears, Preston, 2, and Jayden, 1.