The now 42-member ensemble, led by artistic director Martha Lavey, includes some of the country's finest actors, writers, and directors, including Joan Allen, Kevin Anderson, Gary Cole, Kathryn Erbe, Frank Galati, Terry Kinney, Tina Landau, Tracy Letts, John Mahoney, John Malkovich, Laurie Metcalf, Amy Morton, Austin Pendleton, Martha Plimpton, Rondi Reed, Anna D. Shapiro, Gary Sinise, and Lois Smith.
Petersen's other theater credits include In The Belly of the Beast, The Night of the Iguana, A Streetcar Named Desire, and Glengarry Glen Ross.