Ferguson, 52, announced his plans last April to leave the program at the end of this year. The announcement came as the network chose Stephen Colbert to succeed retiring Late Show star David Letterman instead of Ferguson.
Ferguson has been the emcee of The Late Late Show since 2004. British comedian James Corden is to take over as host in March.
Leno left NBC's The Tonight Show in February after 22 years and was replaced by Jimmy Fallon.