President Obama, Bill Clinton, Katie Couric Appear on Final 'Larry King Live'

'You're not going to see me go away,' the outgoing CNN host tells his audience.

President Obama and a slew of TV news personalities including Katie Couric appeared on the final episode of Larry King Live to honor the outgoing host.

Along with Couric, Diane Sawyer, Barbara Walters and Brian Williams appeared in CNN's New York studio to support King, whose show ended its 25-year run Thursday night. [Related: See Larry King's First Show]

In addition, Obama delivered a taped message, and former President Clinton appeared via remote from Little Rock, Ark., according to the Huffington Post.

King also was serenaded by Tony Bennett, who sang "The Best Is Yet to Come" via remote from Louisiana.

During the show, King thanked his audience for watching and promised not to stay out of the spotlight.

"I'm going to go on and do a lot of other things," including specials on CNN as well as doing some radio work. He also recently said he is planning a comedy tour.

"You're not going to see me go away, but you're not going to see me on this set anymore. ... I don't know what to say except to you, my audience, thank you, and instead of goodbye, how about so long?" King said.

King announced his departure over the summer. Piers Morgan will take over his 9 p.m. slot starting in January.