Anecdotes

Played a regular or recurring character named "Arnold Spivak" in two different television series nearly two decades apart: lawyer Arnold Spivak in ABC prime time series Murder One (1995), and Dr. Arnold Spivak in the original Netflix horror series Hemlock Grove (2013).

He played a character named "Dr. Fred Spivak" as a recurring guest on the series, The Practice (1997), and a character named "Arnold Spivak" as a series regular on Murder One (1995).

Has worked with Scorsese five times - The Aviator (2004), The Departed (2006), The Wolf of Wall Street (2013), Vinyl (2016) for HBO and The Irishmen (2019).

In the play Toad of Toad Hall there were two different "pantomime" horses. Two different actors played the fronts of the two different horses, but MacKenzie played the backside of both.

Has a son, Liam, with Erin Cressida Wilson.