Glengarry Glen Ross
Brain Snacks: Tasty Tidbits of Knowledge
You wouldn't think it, but the hard hitting, foul-mouthed Mamet wrote a hit children's play: Revenge of the Space Pandas. (Source)
Mamet's favorite actor might be his wife, Rebecca Pidgeon. She's appeared in multiple Mamet plays on stage and in his movies The Spanish Prisoner, Heist, State and Main, and The Water Engine.