After writing stints with Saturday Night Live and The Simpsons, Conan O'Brien took over for Jay Leno on The Tonight Show. However, ratings dropped, and Leno returned several months later. O'Brien then moved on to The Late Show, in which he replaced David Letterman. In 2010, O'Brien went on to host Conan. He has recently announced his departure from TBS to launch a new variety show on HBO Max in 2021.
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