“Entourage” star Jeremy Piven started rehearsals this week on another show about the inside world of show-business, only this time it’s on a Broadway stage.

Piven is starring in a revival of David Mamet’s play “Speed-the-Plow,” billed as a “scathing portrait of the film industry and the people who are willing to sell their souls for sex, fame and fortune.”

“It’s an incredibly timely piece. It’s actually more true today even than when he wrote it,” Piven told reporters at the start of the second day of rehearsals on Tuesday.

“We did a reading yesterday and I was surprised yet again how powerful and funny this piece is,” said Piven, looking a little-bleary eyed before the morning rehearsal.

The cast also includes Elisabeth Moss, star of the hit TV show “Mad Men” and familiar to many as the president’s daughter in “West Wing.” She is reviving a role played by Madonna in the last Broadway production of the play 20 years ago.

The third major role is taken by Raul Esparza, the only one of the three who has trod the boards on Broadway before.

Piven starred in the off-Broadway play “Fat Pig” by Neil LaBute in 2004 but this will be his Broadway debut.

Previews start on Oct. 3 at the Ethel Barrymore Theatre and opening night is Oct. 23. 

PICTURE: Reuters/Mike Cassese (Actor Jeremy Piven arrives at special presentation screening of ‘RocknRolla’ at Toronto International Film Festival, 4 Sept. 2008)