O'Brien took over hosting duties the following Monday , June 1 , 2009 .
It was announced on July 21 , 2008 that Jay Leno would host his final episode of The Tonight Show on May 29 , 2009 with Conan O'Brien and James Taylor as his guests .
Conan O'Brien took over hosting duties the following Monday , June 1 , 2009 .
It was announced on July 21 , 2008 that Jay Leno would host his final episode of The Tonight Show on May 29 , 2009 with Conan O'Brien and James Taylor as his guests .