NBC's "The Tonight Show Starring Johnny Carson"


Guest host David Letterman in the 1970s -- News Photo1970-1979,Adult,Arts Culture and Entertainment,Burbank,California,Celebrities,Choice,Colour Image,Curtain,David Letterman - Television Host,Fashion,Guest,Hairstyle,Johnny Carson,Men,Menswear,Night,One Person,People,Pinstripe,Portrait,Suit,Talkshow,Television Host,Television Show,The Tonight Show,The Tonight Show Starring Johnny Carson,USA,VerticalPhotographer Collection: NBCUniversal 2013 NBCUniversal Media, LLCTHE TONIGHT SHOW STARRING JOHNNY CARSON -- Pictured: Guest host David Letterman in the 1970s -- (Photo by: Gene Arias/NBC/NBCU Photo Bank via Getty Images)