'Prison Break' actor joins 'Entourage'

William Fichtner has joined HBO's Entourage, according to The Hollywood Reporter.

The actor, who played Agent Mahone in Prison Break, has reportedly been tapped for a multi-episode arc on the comedy's upcoming sixth series.

Fichtner will play Phil Yagoda, a slick TV producer who had a hit teen series in the '90s.

Additionally, Matt Letscher has been cast as Dan Coakley, a handsome, arrogant TV studio executive, and Ocean's Eleven star Scott Caan has joined as Scotty Lavin, a cocky and highly competitive manager.

Recently, it was announced that Zac Efron had filmed a cameo for the series.