Nick Nolte, Mena Suvari and Jon Foster have been added to the cast of THE MYSTERIES OF PITTSBURGH, the first film from independent financier Groundswell Prods. The three join the previously cast Sienna Miller and Peter Sarsgaard.

Rawson Marshall Thurber ("Dodgeball: A True Underdog Story") is writing and directing THE MYSTERIES OF PITTSBURGH, which is based on the debut novel by Pulitzer Prize-winning author Michael Chabon.

Foster will play Art Bechstein, a recent college graduate trying to escape the clutches of his mobster father (Nolte). The story follows the last summer of Art's youth as he falls into a love triangle with Jane (Miller) and Cleveland (Sarsgaard), a charismatic couple who draw him into a series of exhilarating adventures that ultimately pit him against his father. Suvari will play Phlox, Art's eccentric part-time girlfriend and boss at a discount book chain.

Filming is expected to begin Sept. 5 in Pittsburgh.