Jimmy Fallon by R. Born/WireImage.com Jimmy Fallon by R. Born/WireImage.com

As expected, comedian Jimmy Fallon will host Late Night (12:30 am/ET, NBC) when Conan O'Brien moves to the Tonight Show in 2009.

Fox News.com reports NBC won't make the official announcement until next month, but word leaked out today about the Saturday Night Live alum.

Fallon's late-night coronation is part of what could be a late-night TV sea change in 2009. Rumors are swirling that current Tonight Show host Jay Leno has been courted by other networks about launching a new nighttime talker after he steps down next year. - J.R. Whalen