Will Ferrell will be the first guest on the couch for the debut of The Tonight Show with Conan O'Brien on June 1. Ferrell, who helped usher O'Brien out of New York on the final Late Night with Conan O'Brien will help welcome O'Brien to his new home in Los Angeles. In addition Pearl Jam will be the inaugural band on The Tonight Show with Conan O'Brien. Pearl Jam will perform songs from their upcoming studio album.

Conan O'Brien, the dominant late-night host at 12:35 a.m. (ET) for the past 14 seasons, will succeed Jay Leno as host of the preeminent series on late-night television, NBC's The Tonight Show on June 1, 2009.

The Tonight Show continues to be the most dominant late-night institution in television history. Since it first premiered on September 27, 1954 with Steve Allen, The Tonight Show has had just four permanent hosts, including Leno. Allen, host of the then titled "Tonight," eventually left late night to start his own primetime variety series on NBC. Jack Paar premiered on July 29, 1957. On October 1, 1962, Johnny Carson stepped on stage for day one of his tenure as host of The Tonight Show Starring Johnny Carson. Leno, who began guest-hosting The Tonight Show Starring Johnny Carson in September 1987, became host of The Tonight Show with Jay Leno on May 25, 1992. O'Brien joined NBC as a writer on Saturday Night Live in 1988 and premiered as host of Late Night with Conan O'Brien on September 13, 1993.

The Tonight Show with Conan O'Brien will originate from Stage 1 at Universal Studios in Los Angeles and will be produced by Universal Media Studios. Jeff Ross is the executive producer.