Britney's little sister (and onetime teen mom) Jamie Lynn Spears is engaged at the ripe old age of 21. She's been dating her fiance, Jamie Watson, 30, for about three years.

Spears has been engaged before, to Casey Aldrige, the father of her four-year-old daughter, but they broke up in 2010. Jamie Lynn was the star of the Nickelodeon show Zoey 101 from 2005-2008 until it was canceled in the wake of her pregnancy at age 16.

Is it weird to anyone else that Spears is older than Miley Cyrus? Only by about a year and a half, but still. Anyway, congratulations!

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[via Us Weekly]