Grant O'Brien
Known for
Grant O'Brien is a dependable American actor, rarely out of production for long. 7 years of continuous work sit on the record. If one title has to be named, it is 'Plus One', where he is Greg.
Grant O'Brien
3 Movies
15 Series
Grant O'Brien is a dependable American actor, rarely out of production for long. 7 years of continuous work sit on the record. If one title has to be named, it is 'Plus One', where he is Greg.
TV Shows
Writer
Plays Self
Breaking News: No Laugh Newsroom
2018
Plays Detective Sylvester Cross
Dimension 20
2018
Writer
Plays The Frazier
Bad Internet
2016
Plays Self - Society Member
Smartypants
2024
Writer
Plays Grant
CollegeHumor Does the Purge
2016
Plays Grant O'Brien
Kingpin Katie
2019
Plays Self
Tales from the Closet
2018
Writer
Plays Grant
CollegeHumor Goes to Hell
2015
Plays Self - Guest
Erotic Book Club
2018
Plays Frederick Hoelzel (voice)
WTF 101
2019
Plays Baby Boomer (voice)
Ultramechatron Team Go!
2019
Plays Detective Sylvester Cross (voice)
Dimension 20 Animated
2021
Writer
Plays Cop
Gods of Food
2019
Plays Pants Palace Announcer (voice)
Cartoon Hell
2018
Plays Wilsaban
Troopers: Rise of the Budget
2019
Writer
Plays Charles
Downbeat
2019
Latest Trailers
Watch Trailer
Chris Grace: As Scarlett Johansson
Full Filmography
Chris Grace: As Scarlett Johansson
Grant O'Brien
2024
Film
Smartypants
Self - Society Member · 6 episodes
2024–
TV
The Disruptors
Will Kerrigan
2024
Film
Dimension 20 Animated
Detective Sylvester Cross (voice) · 1 episode
2021–
TV
Ultramechatron Team Go!
Baby Boomer (voice) · 2 episodes
2019–
TV
Gods of Food
Cop · 1 episode
2019–
TV
Plus One
Greg
2019
Film
Kingpin Katie
Grant O'Brien · 4 episodes
2019–
TV
Troopers: Rise of the Budget
Wilsaban · 1 episode
2019–
TV
Photos
Frequently Asked Questions
How old is Grant O'Brien and where are they from?
Grant O'Brien is 40 years old, born on May 15, 1986 in Columbus, Ohio, USA.
What are the most famous roles of Grant O'Brien?
Grant O'Brien is best known for roles in Plus One, The Disruptors, Chris Grace: As Scarlett Johansson.
How many movies has Grant O'Brien been in?
Over a 7-year career (since 2019), Grant O'Brien has appeared in 3 movies and 10 TV shows.
What was Grant O'Brien's first movie?
The career of Grant O'Brien began with Plus One (2019).
What is Grant O'Brien's most recent movie or series?
Grant O'Brien's most recent release is Katie & Erika Throw the Perfect Father’s Day Party, which premiered on June 15, 2025.
What TV shows has Grant O'Brien appeared in?
On television, Grant O'Brien has appeared in Game Changer, Make Some Noise, Dimension 20, Bad Internet.
Grant O'Brien
1986-05-15 · Columbus, Ohio, USA
Grant O'Brien is a dependable American actor, rarely out of production for long. 7 years of continuous work sit on the record. If one title has to be named, it is 'Plus One', where he is Greg.