Mark O'Sullivan

Known for

Acting

Birthplace

Bedford, Bedfordshire, England

Biography

Mark O'Sullivan is a producer, actor, and writer known for Tell Me Everything (2022), Lee and Dean (2017) and My Sexual Abuse: The Sitcom (The Actual Sitcom) (2024). Mark won an RTS award in 2025 for his documentary (and sitcom episode) My Sexual Abuse: The Sitcom, made by Swan Films for Channel 4, was awarded the best Arts programme for 2025.

Best known work

The Nevers

2021

8 Out of 10 Cats Does Countdown

2013

Reaper

2000

My Sexual Abuse: The Sitcom (The Actual Sitcom)

2024

Lee and Dean

2018

Swan

2020

My Sexual Abuse: The Sitcom

2024

Comedy Blaps

2011

Filmography

2024
My Sexual Abuse: The Sitcom
as Self, Writer
2024
My Sexual Abuse: The Sitcom (The Actual Sitcom)
as Mark, Director, Writer
2021
The NeversTV
as Orderly (1 episode)
2020
Swan
as Ted
2018
Lee and DeanTV
as Dean (11 episodes)
2013
8 Out of 10 Cats Does CountdownTV
as Dean - Dictionary Corner (1 episode)
2011
Comedy BlapsTV
as Vic (1 episode), as Grant (1 episode), as Vic - Grant (1 episode)
2000
Reaper
as Doctor