Mark Douglas Brown McKinney is a Canadian actor and comedian. He is perhaps best known as Glenn from Superstore or as a member of the sketch comedy troupe The Kids in the Hall, which includes starring in the 1989 to 1995 TV series The Kids in the Hall and 1996 feature film Brain Candy. He was a cast member on Saturday Night Live from 1995 to 1997; and from 2003 to 2006, he co-created, wrote and starred in the series Slings & Arrows. He also appeared as Tom in FXX's Man Seeking Woman. From 2015 to 2021, he appeared as store manager Glenn Sturgis on NBC's Superstore.

The Kids in the Hall is a Canadian sketch comedy troupe formed in 1984, consisting of comedians Dave Foley, Bruce McCulloch, Kevin McDonald, Mark McKinney, and Scott Thompson. Their eponymous television show ran from 1989 to 1995, on CBC, in Canada. It also appeared on CBS, HBO, and Comedy Central in the United States.