Britney at Hospital While Jamie Lynn Prepares for Labor

Early Thursday morning Britney Spears entered a hospital in Mississippi to be by her little sister, actress Jamie Lynn Spears, as the Zoey 101 star prepares to give birth to her first child.

Jamie Lynn walked into the hospital late Wednesday night, only hours after her big sis had made her way from L.A. to her home in Kentwood, Louisiana, to join her family for the momentous occasion.

Stay tuned to OK! for the official announcement!