Teen actress Jamie Lynn Spears is reportedly set to marry her longtime boyfriend and unborn baby's father CASEY ALDRIDGE. The 16-year-old has been spotted showing off a diamond band to friends and family in her hometown of Kentwood, Louisiana, and to relatives in Mississippi. A source close to the Spears family tells People.com, "She's got an engagement ring. She's been showing it off, talking about it." A representative for Spears was unavailable for comment as WENN went to press. The Zoey 101 star is expected to give birth to a baby boy this summer (08).