BURBANK (CBS) — Conan O’Brien returns to late-night television Monday, after more than nine months off the air.

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“Conan” will air Mondays through Thursdays at 11 p.m. on TBS.

The identity of the show’s first guest, chosen by a poll on O’Brien’s website, Teamcoco.com, was not announced. Actor Seth Rogen and musical guest Jack White also will appear on the first show.

Andy Richter will serve as O’Brien’s sidekick, a role he held on NBC’s “Late Night with Conan O’Brien” from 1993 to 2000 and during O’Brien’s nearly eight-month stint as host of “The Tonight Show.”

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O’Brien signed with the Time Warner Inc.-owned cable network in April, about three months after leaving NBC.

O’Brien rejected NBC’s offer in January to have “The Tonight Show” start a half-hour later to accommodate a half-hour version of “The Jay Leno Show.”

With television not an option, O’Brien embarked on “The Legall Prohibited from Being Funny on Television Tour” from April to June.

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