Jamie Lynn Spears Engaged!

Access Hollywood
Jamie Watson and Jamie Lynn Spears - March 2, 2013 -- Instagram
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Jamie Watson and Jamie Lynn Spears - March 2, 2013 -- Instagram

Britney Spears and Jason Trawick may have called off their wedding, but there's another Spears sister getting hitched!

Brit's 21-year-old sister, Jamie Lynn Spears, is engaged to boyfriend Jamie Watson, 30.

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The former Nickelodeon star announced the happy news via Instagram on Saturday.

"Guesssss what??????" she captioned a photo of her now-fiance and herself holding up her left hand to reveal her new sparkler.

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She later added a close-up shot of her beautiful diamond ring with the caption, "He did good."

PHOTO: See Jamie Lynn Spears' engagement ring!

This will be the first marriage for the former "Zoey 101" actress.

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Jamie Lynn has a 4-year-old daughter, Maddie, from her previous relationship with Casey Aldridge, whom she split from in 2010.

-- Erin O'Sullivan

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