Simpson's team is spinning this as a strategic return to premium television after his acclaimed 'Westworld' run, with the Emmy-nominated actor positioning himself alongside one of the biggest names in prestige TV. The mystery surrounding his character? Pure casting gold—keeping audiences guessing only builds anticipation.
Insiders are whispering about why Simpson's role is being guarded so tightly. Sources close to production hint that whatever he's playing could upend the entire series' power dynamics. One industry spy tells us the character might not be what fans expect from the 'Black Mirror' star's typical roles—and that's by design.
Simpson earned an Emmy nomination for outstanding guest actor in a drama series in 2018 for his work on HBO's 'Westworld.' The show was greenlit at Hulu in February 2026, with production already underway. His character details remain completely undisclosed as of June 12, 2026.
Hulu is building a serious prestige drama here—and keeping Simpson's role under wraps suggests they're saving something explosive for the reveal.
Jimmi Simpson is heading back to premium television, and this time he's bringing his signature intensity to Hulu's upcoming legal thriller "Conviction." Variety broke the exclusive news on Thursday that Simpson has officially joined the cast of the streamer drama, starring alongside previously announced lead Elisabeth Moss. The casting announcement comes with one glaring omission: absolutely no details about who Simpson will be playing. Production is keeping his character under wraps tighter than a classified government file, which only adds fuel to speculation about what kind of chaos he's bringing to this story.
Simpson will appear alongside Sebastian De Souza and Adam Godley in the project, which was greenlit by Hulu back in February. For those unfamiliar with Simpson's body of work—and let's be honest, some of you probably only remember him from that one episode of "It's Always Sunny in Philadelphia"—the man has range. He earned an Emmy nomination for outstanding guest actor in a drama series in 2018 for his haunting turn as William in HBO's "Westworld." The role saw him explore themes of consciousness, manipulation, and identity—and he did it all with a quiet intensity that made audiences genuinely uncomfortable in the best way possible.
He also delivered a standout performance in Netflix's "Black Mirror" episode "USS Callister," reprising that role years later in the followup "USS Callister: Into Infinity." The logline for "Conviction" paints Moss as criminal defense attorney Neve Harper, a confident lawyer whose career-making case turns into a nightmare when she's blackmailed by a mysterious stranger. The high-profile murder case involves a husband accused of killing his wife by setting their home on fire—because apparently arson wasn't dramatic enough without legal consequences.
David Shore is adapting the Jack Jordan novel for television and serving as showrunner, with Moss also executive producing under her Love & Squalor Pictures banner. Warren Littlefield, who previously worked with Moss and Hulu on both "The Handmaid's Tale" and "The Testaments," is also attached as executive producer. The project hails from 20th Television, where both Shore and Littlefield maintain overall deals.
Given this pedigree, it's clear Hulu isn't messing around—this is positioned as a prestige play in the crowded streaming drama space. What remains to be seen is just how integral Simpson's mysterious character will be to Harper's descent into moral compromise. With details locked down, we're left theorizing: Is he the blackmailer?
A rival attorney? The accused husband himself? Only time and a trailer release will tell—and based on how well this production has kept quiet, that might not be happening anytime soon.
