Jamie Lynn Spears' father is believed to be "furious" about her decision to sell the story of her pregnancy to a celebrity magazine.

Britney's 16-year-old sister announced that she is expecting a baby with boyfriend Casey Aldridge in an interview with the US edition of OK! magazine, which was published yesterday. Her mother Lynne was also interviewed by the publication.

However, Jamie Lynn's dad Jamie, who is separated from Lynne, reportedly disapproves of the way they announced the pregnancy.

A source told Usmagazine.com: "He put his foot down and refused to take any money and 'profit off of his children'. Lynne didn't care."

The source also claims that Jamie is "devastated" by the news and "feels Jamie Lynn ruined her life".