Featuring what UPN bills as "exclusive, never-before-seen private home videos they shot themselves during their courtship, engagement and wedding," the six-episode series will premiere with a special one-hour episode May 17 (9 p.m. ET). A video clip is available on UPN's Web site.
Spears, 23, announced last month that she is pregnant with the couple's first child. Spears and Federline were married in September.