
Greg Sestero was born and raised in the San Francisco Bay Area. With European parental influence, Greg speaks both French and English. He traveled extensively early on, and holds dual citizenship between France and the United States.
At 17 years old, Greg signed with a prominent San Francisco talent agency. The same year, he left for Milan and Paris to work for designers such as Giorgio Armani and Gian Franco Ferre. Greg returned focused on acting. He began studies at the American Conservatory Theatre in San Francisco. He landed his first role at age 18, on the CBS hit show Nash Bridges (1996). This followed with a role in the Golden Globe nominated film, Patch Adams (1998) starring fellow San Francisco native, Robin Williams. Soon thereafter, Greg was signed by well-known Hollywood agent, Iris Burton, which prompted his move to Los Angeles.
Sestero starred in the notorious The Room (2003), which gained an international cult following as the best worst movie ever made.
in 2013, Sestero wrote a book entitled The Disaster Artist, chronicling his experience making the film and working with its enigmatic director Tommy Wiseau. The book went on to become a critically acclaimed bestseller. In February 2014, the book was optioned to made into a feature film by Hollywood superstars James Franco and Seth Rogen.

The Room Returns!
Chris-R
2025

Conjuring Tapes
Greg
2025

Point
(voice)
2025

Bampire
Park Ranger
2024

The Founder Effect
Decklan Bakker
2023

The Christmas Tapes
Geoff/The Owner’s Manual
2022

Puppet Master: Doktor Death
André Toulon (archive footage) (uncredited)
2022

Infrared
Geoff
2022

Best F(r)iends: Less is More
Jon Kortina
2022

Miracle Valley
David
2021

The Caring Only Cry at Night
Rick Edwards, Motivational Speaker
2020

The Haunting of Bly Manor
Fiancé · (2 episodes)
2020

Cyst
Bill
2020

The Wrong Wedding Planner
Mr. Hanson
2020

Time Warp Vol. 3: Comedy and Camp
Self
2020

SpaceWorld: "A Good Lesson"
Drogol
2019

Best F(r)iends: Volume 2
Jon Kortina
2018

Four in a Blanket
Coach Sooie (Voice) · (4 episodes)
2018

Oh, Hi Mark: Making a Disaster
Self
2018

Best F(r)iends: Volume 1
Jon Kortina
2017

The Disaster Artist
Casting Agent (uncredited)
2017

VHS Massacre: Cult Films and the Decline of Physical Media
Self
2016

Livers of Darkness: Making "Dude Bro Party Massacre III"
Himself
2016

Dude Bro Party Massacre III
Derek
2015

The Pit and the Pendulum
The Ex
2009

Alien Presence
Ash
2009

The Brotherhood V: Alumni
2009

Behind the Scenes of "The Room"
Self
2005

Puppet Master: The Legacy
Young Andre Toulon (Archive Footage)
2003

The Room
Mark
2003

Retro Puppet Master
Andre Toulon
1999

Forbidden Sky

Accepted
Frat guy (uncredited)
2006

EDtv
Roach
1999

Patch Adams
Jaime
1998

Gattaca
Gattacan Citizen (uncredited)
1997