Mark Zeisler is an actor, best known for Head of State, Two Weeks Notice, Shaft, and The Thomas Crown Affair. Other film credits include Irrational Man, Pervertigo, A Secret Promise, Afterschool, Revolution #9, Random Hearts, The Prosecuters, and Torch Song Trilogy.

Theatre credits include Mike/Alfieri in A View From the Bridge (Criterion Center Stage/Neil Simon Theatre), Nat Danziger/Marcus Hoff in The Big Knife (American Airlines Theatre), and Eric Weiss/Ira Zimmer in Brooklyn Boy (Biltmore Theatre); and Off-Broadway, as Jerry/Wazzel in Piece of My Heart: The Bert Berns Story (Irene Diamond Stage), Henry and Lucas in Sex Lives of Our Parents (McGinn-Cazale Theatre), Bertram Wolfe/Vidala/Others in Modotti and Samuel Rosenman/Others in The Accomplices (Acorn Theatre), Lord of the Underworld/Others in eurydice (Second Stage Theatre), and Angelo’s Servant/Claudio in Measure for Measure (Delacorte Theatre).