DVR Alert: Talk Shows Thurs., April 1 - Mulligan & More

David Letterman: Sam Worthington, Patty Loveless

Jay Leno: Justin Bieber

Jimmy Kimmel: Carey Mulligan, "Science Bob" Pflugfelder, OK Go

Craig Ferguson: Robin Williams, Jonathan Dancy

Jimmy Fallon: Ricky Gervais, Mary Lynn Rajskub, Easton Corbin

Carson Daly: Victor Rasuk, Mishka

Tavis Smiley: Jakob Dylan

Daily Show: Edward Norton

Colbert Report: Judith Shulevitz

Lopez Tonight: Usher, Ron Artest

The View: Vera Wang, Emilio Estefan (R 1/15/10)

Regis and Kelly: Janet Jackson, the first castoff from "Dancing With The Stars", guest co-host Carrie Ann Inaba

Ellen Degeneres: Sharon Osbourne, Usher, the latest "American Idol" castoff

Bonnie Hunt: Rob Corddry