Britney Spears is hoping to talk some sense into little sister, Jamie-Lynn Spears on marrying boyfriend, Casey Aldridge.

The troubled pop-star is said to be worried about her sister making the same mistakes that she did with ex-husband Kevin Federline.  

The Zoey 101 star recently gave birth to Casey’s child and the two are said to be planning on making their relationship official with a lavish wedding.

If the marriage is to go ahead, Jamie-Lynn will be a younger bride than Britney herself - at only 17-years-old the younger Spears sister would be making it down the isle three years earlier than her big sis.

Britney got married twice in 2004 - First to Jason Alexander, which was quickly annulled, and, second, to Kevin Federline, which only lasted two years.

An insider tells In Touch: “(Britney) is worried for her and doesn’t want Jamie Lynn to make the same mistakes she did with Kevin Federline. She thinks she’s way too young to marry Casey – especially if he’s been cheating.”

Rumours of Casey’s cheating have reportedly caused Jamie-Lynn to move in with her mum, Lynn Spears, temporarily whilst she sorts her head out.