Gossip Jamie Lynn Sporting A Rock?

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Jamie Lynn Spears has a new accessory to go with her growing baby bump.

She's reportedly engaged!

A source close to the family told PEOPLE that she has been showing off her flashy piece of jewelry to family and friends around Louisiana and Mississippi. "She's got an engagement ring, " the source said. "She's been showing it off, talking about it."

Her fiance is...you guessed right, 18-year-old Casey Aldridge. The two are expecting a baby sometime this summer.

- Erin Dustin