'Come on Down!'Celebrate Bob Barker’s 91st Birthday by Checking Out 10 Classic Game Show Hosts Then and Now!

Happy 91st birthday, Bob Barker!

To celebrate, click through the gallery below to see 10 hosts of classic game shows — from The Price is Right and 'Wheel of Fortune' to 'The Newlyweds Game' and 'Jeopardy!' — then and now!