Tim Sims (1962 – February 2, 1995) was a Canadian actor and comedian. He is known for his roles as Jack the Cave Man on The Red Green Show and as Circle Researcher Rory Tate in a series of Reese's Peanut Butter Cup commercials in the 1990s. He also performed sketch comedy with The Second City. Sims died at the age of 33 from AIDS-related causes. The Tim Sims Encouragement Fund Award and Tim Sims Playhouse, a Toronto venue used by The Second City, are both named in his honour.