
Brett Clifford Gelman is an American actor and comedian. He was born on October 6, 1976, in Highland Park, Illinois. He is best known for his roles as Murray Bauman in the Netflix series Stranger Things and Martin on the BBC series Fleabag.
Gelman began his career as a comedian in the early 2000s. He performed in numerous comedy clubs and improv theaters in New York City. In 2009, he was a writer and performer on the sketch comedy series Eagleheart. He also had a recurring role on the comedy series Another Period.
In 2016, Gelman was cast as Murray Bauman in the third season of Stranger Things. His character is a conspiracy theorist who helps the main characters investigate the supernatural events in Hawkins, Indiana. Gelman has since appeared in all four seasons of the show.
In 2016, Gelman also starred in the BBC series Fleabag. He played Martin, the boyfriend of the show's main character, Fleabag. Gelman's performance was critically acclaimed, and he was nominated for a Primetime Emmy Award for Outstanding Supporting Actor in a Comedy Series.
Gelman has also appeared in numerous films, including The Other Guys (2010), 30 Minutes or Less (2011), and A Very Harold & Kumar 3D Christmas (2011). He has also had recurring roles on the television shows Go On, Married, and Camping.

One Last Adventure: The Making of Stranger Things 5
2026 · as Self - Murray Bauman

The Other Guys
2010 · as Hal

Watching the Detectives
2007 · as Glenn

Tom Clancy's Without Remorse
2021 · as Victor Rykov

Strays
2023 · as Willy

Boy Kills World
2024 · as Gideon Van Der Koy

Lyle, Lyle, Crocodile
2022 · as Alistair Grumps

The Disaster Artist
2017 · as Acting Teacher (uncredited)

Wilson
2017 · as Robert

30 Minutes or Less
2011 · as Pizza Boss

Jobs
2013 · as Jeff Raskin

Joshy
2016 · as Greg

A Very Harold & Kumar Christmas
2011 · as T.V. Director

Flock of Dudes
2015 · as Howie

Metal Lords
2022 · as Dr. Sylvester

Like Father
2018 · as Frank Lerue

Lemon
2017 · as Isaac

DRIB
2017 · as Brady Thompson