Larry King is preparing to step down from CNN's Larry King Live after 25 years. Tonight's show will be the last one, and ironically, it will be hosted by King's good friend, Ryan Seacrest.

77-year-old King tells our X17 videographer that tonight's show will be filled with "lots of surprises." On schedule to appear is King's first-ever guest, former New York governor Mario Cuomo.

Piers Morgan will take over the CNN spot with Piers Morgan Tonight. As for King, he has agreed to produce four specials a year for the network.