Steppenwolf Theatre Company is a Chicago theater company founded in 1974 by Terry Kinney, Jeff Perry, and Gary Sinise in the Immaculate Conception grade school in Highland Park, Illinois[1] and is now located in Chicago's Lincoln Park neighborhood on Halsted Street. After occupying several theatres in Chicago, in 1991, it moved into its own purpose-built complex with three performing spaces, the largest seating 550.[2][3]

The theatre's name comes from Hermann Hesse's novel Steppenwolf, which original member Rick Argosh was reading during the company's inaugural production of Paul Zindel's play, And Miss Reardon Drinks a Little, in 1974.[4] A recipient of the Regional Tony Award,[5] it has produced several shows that have transferred to Broadway.

https://en.wikipedia.org/wiki/Steppenwolf_Theatre_Company

Four of the most famous actors appear in the back, consecutively, from L-R. See how many you can get in total, then check the comment below.

(the photo was posted just yesterday from Gary Sinese's media feed)