Jamie Lynn Spears with soon to be dad Casey

EXCLUSIVE Britney SpearsÍ 16 year-old sister Jamie Lynn has announced that she is 12 weeks pregnant. Here she is seen on June 26, 2006 with her boyfriend and the father of the baby, Casey Aldridge (in yellow), in Malibu after dining with mom Lynne, sister Britney, Kevin Federline, and baby Sean Preston at Nobu. The couple is also seen on June 28, 2007 on gold cart, apartment hunting in Valencia, CA. IBL *** Local Caption *** 06440164