Britney Spears' little sister Jamie Lynn Spears has given birth to a baby girl, Maddie Briann.

The 17-year-old Joey 101 star checked into the Mississippi Southwest Regional Medical Center in McComb, Mississippi at 4am local time today.

And at 8.30am she welcomed a 6lbs, 10oz baby girl, reports The National Enquirer.

Auntie Brit was on hand to help - she was snapped arriving at the hospital early this morning.

Maddie is Jamie Lynn and her fiance Casey Aldridge's firstborn.

The teen star stunned the Spears family when she announced her pregnancy news last year, at the age of 16.