Jimmi Simpson is an American actor known for character-driven performances across television, film, and stage. He gained recognition as Liam McPoyle on It's Always Sunny in Philadelphia and earned critical acclaim for his Emmy-nominated portrayal of William in HBO's Westworld. His credits also include House of Cards, Black Mirror (the Emmy-winning "USS Callister"), and Pachinko. Simpson's style is thoughtful and low-key, with an appreciation for distinctive sunglasses that reflect his creative, slightly offbeat sensibility.
Jimmi Simpson has carved out a singular niche in Hollywood by making the strange feel human. Born in Hackettstown, New Jersey, in 1975, he studied theater at Bloomsburg University before moving into television and film. His breakthrough came with the grotesque, perpetually milky-faced Liam McPoyle on It's Always Sunny in Philadelphia, a role that could have typecast a lesser actor. Instead, Simpson used it as a springboard, demonstrating over the following years that he could disappear into virtually any character — unsettling or sympathetic, comic or tragic — with equal conviction.
His performance as William in the first season of HBO's Westworld earned him an Emmy nomination and widespread recognition for work that was deceptively layered. The character arc required Simpson to play two versions of the same man: a naive, lovestruck newcomer to the park and, in a devastating twist, the host whose memories formed the foundation of a much darker narrative. It was the kind of role that demands an actor who can communicate volumes in a single look, and Simpson delivered. He followed it with a standout turn in Black Mirror's "USS Callister," part of the episode that won the series its first Emmy for Outstanding Television Movie.
Simpson's filmography extends into prestige drama with House of Cards, the sweeping family saga Pachinko, and genre work including Date Night and White House Down. He also maintains an active stage career, having appeared in productions that reinforce his reputation as an actor who prioritizes craft over celebrity.
Off camera, Simpson avoids the trappings of Hollywood flash. His personal style is understated — dark denim, fitted jackets, well-chosen boots — but consistently elevated by carefully selected accessories. Sunglasses are a recurring motif, with Simpson gravitating toward vintage-inspired frames, round metals, and distinctive shapes that add a touch of idiosyncrasy without veering into costume. Whether attending a premiere, a press junket, or simply moving through Los Angeles, his eyewear choices reflect the same intelligence and attention to detail that define his performances. In an industry that often rewards sameness, Simpson's willingness to stay true to his off-kilter sensibility — on screen and in his sunglasses selection — remains a quiet strength.
