Mark Margolis (born November 26, 1939) is an American actor who has been appearing in films since 1976.
Margolis was born in Philadelphia, Pennsylvania, to a Jewish immigrant family from Europe. He went to Temple University briefly before moving to New York City, where he studied drama with Stella Adler and at the Actors Studio. He is noted for his supporting roles in Scarface and the films of Darren Aronofsky: π, Requiem for a Dream, The Fountain, The Wrestler, and Black Swan. Aronofsky wrote the role of Father Avila in The Fountain specifically for Margolis.
He has had recurring roles on numerous TV shows, including The Equalizer, Quantum Leap, Oz,Law & Order, Crossing Jordan, Californication and Breaking Bad where he plays Héctor "Tio" Salamanca, a retired Mexican drug cartel enforcer, confined to a wheelchair and unable to speak, instead using a bell for communication after suffering a stroke late in his life. For his role in Breaking Bad, Margolis received a nomination for a Primetime Emmy Award for Outstanding Guest Actor in a Drama Series.
In 1991, he played Helmut Dieter in soap opera Santa Barbara.