Guests for "David Letterman," which airs weeknights at 11:35 PM ET, follow:

Monday, April 28: Actor Joel McHale; musical guest Aloe Blacc
Tuesday, April 29: Actress Lucy Liu from the CBS drama series “Elementary”; musical guest Ziggy Marley
Wednesday, April 30: Actor Kiefer Sutherland; author Adam Resnick; musical guest Benjamin Booker
Thursday, May 1: Comedian Louis C.K.; a performance from the Broadway musical Rocky
Friday, May 2: Comedian Don Rickles; comedian Carmen Lynch; musical guests The Ghoset of a Saber Tooth Tiger

Guests for "Craig Ferguson," which airs weeknights at 12:37 AM ET, follow:

Monday, April 28: Actor LL CooL J from the CBS drama series “NCIS: Los Angeles”; actress Candice Accola
Tuesday, April 29: Actress Valerie Bertinelli; actor Seth Gabel
Wednesday, April 30: Comedian Jim Gaffigan; actress Rachael Taylor
Thursday, May 1 Actress Cheryl Hines; UFC Fighter Rampage Jackson
Friday, May 2 Dancer Carrie Ann Inaba; wildlife expert Bradley Trevor Greive

Lineup of guests is subject to change.