LOS ANGELES (AP) - "Tonight" show host Jay Leno has taken ill and the taping of Thursday night's show has been canceled.
His spokesman, Dick Guttman, says Leno left his office at NBC's Burbank studios about midday, and checked himself into a hospital for observation.
Guttman characterized his ailment as "mild."
Guests on the show were expected to be Ryan Reynolds, Jules Sylvester and swing band Big Bad Voodoo Daddy.
Instead, NBC will air a rerun.