Jimmi Simpson Movies and TV Shows: A Filmography
Explore Jimmi Simpson’s television and movie roles, including Liam McPoyle, with a credits guide organized by series and film.
Jimmi Simpson Movies and TV Shows: A Filmography
Jimmi Simpson is an American actor whose television work spans absurd comedy, science-fiction mystery and contemporary drama. He is especially recognizable as Liam McPoyle in It's Always Sunny in Philadelphia and William in Westworld, two characters whose personalities and stories could hardly be more different.
From cult comedy to prestige drama
The McPoyle family's bizarre behavior is a recurring source of chaos in It's Always Sunny in Philadelphia. Simpson's Liam McPoyle belongs to that fictional family; the show's running jokes should not be confused with facts about the actor. The role helped establish Simpson's comfort with physically exaggerated, deliberately uncomfortable comedy.
Westworld placed him in a dramatically different setting. He played a younger William, whose story explores choices, identity and the effects of the park on its guests. That part makes a useful contrast with Liam: the performance depends on reserve and gradual change, rather than instantly recognizable comic intensity.
Other television credits
In Psych, Simpson appeared as Mary Lightly, an eccentric figure connected to a major mystery arc. He also portrayed Lloyd Lowery in Breakout Kings and appeared in House of Cards and Black Mirror. These are separate story worlds, so characters should be identified by series rather than loosely described as one type of character.
His career also includes roles in later genre television and voice work. For a quick introduction, the combination of Psych, Westworld and It's Always Sunny gives the broadest sense of his range without requiring viewers to search every guest appearance.
Selected film appearances
His films include Zodiac, White House Down and Under the Silver Lake. The list crosses crime drama, blockbuster thriller and offbeat mystery. Simpson's film résumé is substantial, but his best-known credits may differ by audience: a comedy fan may mention the McPoyles first, while a science-fiction viewer may begin with Westworld.
Frequently asked questions
Is Jimmi Simpson Liam McPoyle?
Yes. He plays Liam McPoyle in It's Always Sunny in Philadelphia.
Who does Jimmi Simpson play in Westworld?
He portrays the younger William, a key character in the series' story.