'Entourage,' 'Heroes' add more guest stars

HBO's "Entourage" and NBC's "Heroes" have added still more guest stars to their forthcoming seasons.

William Fichtner ("Prison Break"), Matt Letscher ("Eli Stone") and Scott Caan ("Ocean's Thirteen") have all signed on for guest arcs on "Entourage," according to The Hollywood Reporter. "Days of Our Lives" actress Rachel Melvin will guest on "Heroes" in a role that could become recurring.

Fichtner, who recently wrapped his role as Alexander Mahone on "Prison Break," will play a TV producer who's looking to remake his hit 1990s series (think "90210") and wants Drama (Kevin Dillon) to be involved.

That may not sit well with Letscher's character, a cocky studio executive who oversees Drama's current TV show, "Five Towns." Letscher played Eli's (Jonny Lee Miller) brother Nate on "Eli Stone" and did a guest arc on "Brothers & Sisters" at the end of the season.

Caan is set to play a manager who considers Eric (Kevin Connolly) a rival. He starred in FOX's pilot "Cop House" this spring.

On "Heroes," Melvin will play another college roommate of Claire's (Hayden Panettiere), along with the recently cast Madeleine Zima. The HR notes that her character may have something in common with the indestructible Claire besides the room they share, suggesting she too may have powers.

Related:

Zac Efron to play himself on 'Entourage'
More 'Heroes' casting: Darth Maul signs on
'Heroes' villain is 'Prison Break' ex-con
Madeleine Zima moves in with 'Heroes'