Showtime’s “Roadies” has added a number of high-profile guest stars for its upcoming episodes, Variety has learned.

David Spade will appear as Harris DeSoto, star of the fictional drama “Dead Sex,” a must-see favorite of the roadies. Rosanna Arquette has signed on as a smug and intimidating iconic rock photographer who battles with Shelli (Carla Gugino) over her unusual concepts. This Sunday, comedian Marc Maron, playing himself, finds that comedy and rock aren’t always in perfect harmony, and legendary rocker John Mellencamp will also guest star as himself, giving some much-needed wisdom to Wes (Colson Baker a.k.a. Machine Gun Kelly) and Winston (Ethan Michael Mora).

The show has already drafted a number of guest stars including Rainn Wilson, Eddie Vedder and Matt Passmore, among others.

“Roadies” is created, written and executive produced by Oscar winner Cameron Crowe. The season finale will air Sunday, August 28th.

Watch a sneak preview of Mellencamp’s performance below.