Saul Rubinek (born July 2, 1948) is a German-born Canadian actor, director, producer, and playwright. He is widely known for his television roles, notably Artie Nielsen on Warehouse 13, Donny Douglas on Frasier, Lon Cohen on A Nero Wolfe Mystery, and Louis B. Mayer on The Last Tycoon. He also starred in the films Against All Odds (1984), Wall Street (1987), The Bonfire of the Vanities (1990), Unforgiven (1992), Nixon (1995), True Romance (1993), The Express (2008), Barney's Version (2010), and The Ballad of Buster Scruggs (2018).

Rubinek was born in Föhrenwald, Germany, in 1948. His parents were Polish Jews who had been hidden by Polish farmers during World War II. They immigrated to Canada after the war.

Rubinek began his acting career in theater, appearing in several productions with the Stratford Shakespeare Festival and Theatre Passe Muraille. He made his television debut in 1977, with a guest appearance on the series Baretta.

In 1984, Rubinek starred in the film Against All Odds. He followed that up with roles in the films Wall Street (1987), The Bonfire of the Vanities (1990), and Unforgiven (1992).

In 1995, Rubinek starred in the film Nixon. He received critical acclaim for his performance, and he was nominated for a Golden Globe Award for Best Supporting Actor – Motion Picture.

In 1998, Rubinek directed his first feature film, Jerry and Tom. The film was nominated for the Grand Jury Prize at the Sundance Film Festival.

From 2009 to 2014, Rubinek starred as Artie Nielsen on the Syfy series Warehouse 13. The series was a critical and commercial success, and it ran for five seasons.

In 2013, Rubinek starred as Louis B. Mayer on the Amazon Prime series The Last Tycoon. The series was based on the novel of the same name by F. Scott Fitzgerald.

Rubinek is a five-time Genie Award nominee, winning Best Supporting Actor for Ticket to Heaven (1981). He is also a two-time Gemini Award nominee.

Rubinek is married to Elinor Reid, a playwright and producer. They have two children.