James Douglas Muir Leno is an American television host, comedian, and writer. After doing stand-up comedy for years, Leno was chosen in 1992 to replace Johnny Carson as the host of NBC's The Tonight Show; Leno hosted The Tonight Show… James Douglas Muir Leno is an American television host, comedian, and writer. After doing stand-up comedy for years, Leno was chosen in 1992 to replace Johnny Carson as the host of NBC's The Tonight Show; Leno hosted The Tonight Show until September 2009 when Conan O'Brien took over as host and Leno started a primetime talk show, The Jay Leno Show, which aired weeknights at 10:00 p.m. ET, also on NBC. O'Brien turned down NBC's offer to have Leno host a half hour monologue show before The Tonight Show to boost ratings amid reported viewership diminishing, which sparked the 2010 Tonight Show conflict that resulted in Leno's returning to hosting the show on March 1, 2010.
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