The Definitive 'You' Season 4 Cast List: Who Played The New London Elite And How Joe Goldberg Met His Match

The fourth season of Netflix's psychological thriller, You, delivered a massive shake-up to the core formula, transporting serial killer Joe Goldberg—now operating under the alias Professor Jonathan Moore—from the suburban nightmare of Madre Linda to the sophisticated, yet equally treacherous, world of the London elite. As of this definitive update on December 10, 2025, the complete cast list and their roles have been cemented, revealing the new targets, allies, and enemies that defined Joe's time across the pond, culminating in a shocking twist that redefined his character arc.

The casting strategy for You Season 4 was a masterclass in re-invention, introducing over a dozen new faces to populate the "Eat the Rich" mystery, while keeping a few crucial threads from previous seasons alive. The new ensemble, predominantly composed of British actors, brought a distinct, icy energy to the series, perfectly contrasting Joe's American intensity. This comprehensive guide breaks down every main character, offering a full biographical profile of the actors who brought the exclusive London social circle to life.

Complete Biographical Profiles of the 'You' Season 4 Main Cast

The core of You Season 4 revolved around a fresh group of wealthy, privileged friends. Here is a detailed look at the actors who joined Penn Badgley and Tati Gabrielle in the new chapter.

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Penn Badgley as Joe Goldberg / Professor Jonathan Moore

• Full Name: Penn Dayton Badgley
• Born: November 1, 1986 (Baltimore, Maryland, USA)
• Role in You Season 4: Joe is now living in London, teaching as a literature professor named Jonathan Moore, determined to leave his killer past behind and find Marienne. He becomes entangled with a new group of wealthy socialites and finds himself on the receiving end of a stalker and murderer.
• Known For: His breakout role as Dan Humphrey in *Gossip Girl*, and his acclaimed portrayal of Joe Goldberg across all seasons of *You*. Other notable work includes the film *Easy A* and the series *The Slap*.

Tati Gabrielle as Marienne Bellamy (Returning)

• Full Name: Tatiana Gabrielle Hobson
• Born: January 24, 1996 (San Francisco, California, USA)
• Role in You Season 4: Marienne is the object of Joe's obsession from Season 3. She is in Europe, on the run from Joe, and is a crucial part of the season's storyline as Joe attempts to find her and convince her of his "change."
• Known For: Gaia in *The 100*, Prudence Blackwood in *Chilling Adventures of Sabrina*, and Hannah in the film *Uncharted*.

Charlotte Ritchie as Kate Galvin

• Full Name: Charlotte Anne Ritchie
• Born: August 29, 1989 (London, England)
• Role in You Season 4: Kate is the new female lead and Joe's primary love interest. She is an icy, fiercely intelligent art gallery director who is suspicious of Joe from the start. She is best friends with Lady Phoebe and dates Malcolm.
• Known For: Her extensive work in British television, including the popular comedy series *Ghosts* (as Alison Cooper), *Fresh Meat* (as Oregon), and the drama *Call the Midwife* (as Nurse Barbara Hereward).

Ed Speleers as Rhys Montrose

• Full Name: Edward John Speleers
• Born: April 7, 1988 (Chichester, England)
• Role in You Season 4: Rhys is an aspiring politician, a charming and witty author who came from humble beginnings and is now part of the elite circle. He quickly befriends Joe and is initially positioned as a key ally in the group.
• Known For: Playing the title role in the fantasy film *Eragon*, and his major roles in the historical dramas *Downton Abbey* (as James "Jimmy" Kent) and *Outlander* (as the villainous Stephen Bonnet).

Lukas Gage as Adam

• Full Name: Lukas Gage
• Born: May 28, 1995 (San Diego, California, USA)
• Role in You Season 4: Adam is an American expat, the spoiled, wealthy son of a powerful mogul. He is an entrepreneur who struggles to meet his father's expectations and is in a tumultuous relationship with Lady Phoebe.
• Known For: His memorable roles in critically acclaimed HBO series, including Dillon in *The White Lotus* (Season 1) and Tyler in *Euphoria*. He also appeared in the mockumentary *American Vandal*.

Tilly Keeper as Lady Phoebe

• Full Name: Matilda Elizabeth Keeper
• Born: August 16, 1997 (London, England)
• Role in You Season 4: Lady Phoebe is a wealthy, high-profile socialite and influencer with a massive following. She is Kate’s best friend and Adam’s girlfriend, and despite her public persona, she harbors deep insecurities.
• Known For: Her long-running role as Louise Mitchell in the popular BBC soap opera *EastEnders* from 2016 to 2020.

The New 'Eat the Rich' Setting: Joe's Identity Crisis in London

The shift in setting was more than a cosmetic change; it fundamentally altered the show’s narrative and Joe’s role within it. Season 4, split into two parts, saw Joe adopt the persona of Professor Jonathan Moore, a literature expert at a prestigious London university.

The new London backdrop introduced a fresh theme: the "Eat the Rich" mystery. Instead of stalking a singular target, Joe found himself immersed in a clique of the ultra-wealthy, a group he initially despises. This time, Joe is not the predator, but the prey, as a mysterious killer begins eliminating members of this privileged social circle, forcing Joe to play detective to protect himself and his new obsession, Kate.

This narrative inversion was a key factor in the season’s critical success, allowing the show to explore class dynamics and the moral ambiguities of the super-rich, a stark contrast to the California-centric plots of previous seasons.

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The Supporting Cast and the Social Circle

The extended cast of *You* Season 4 further fleshed out the opulent, toxic world of the London elite, providing a plethora of potential suspects for the murder mystery. These characters represent the various facets of the "moneyed class," from entitled trust fund babies to struggling artists and opportunistic journalists.

• Stephen Hagan as Malcolm: Kate’s wealthy, hard-partying boyfriend and a fellow professor at the university who introduces Joe to the social circle.
• Amy Leigh Hickman as Nadia: A sharp, literature-loving student of Joe's who becomes suspicious of his past.
• Ben Wiggins as Roald: A hostile, aristocratic member of the group who views Joe as an unwelcome outsider.
• Eve Austin as Gemma: A privileged, gossipy member of the inner circle who is often the target of Joe's internal judgments.
• Ozioma Whenu as Blessing: A wealthy Nigerian princess who is a cryptocurrency entrepreneur.
• Dario Coates as Connie: An upper-class, sports-obsessed friend who is a classic example of inherited wealth.

Filming Locations: Bringing the London Elite to Life

To establish the new setting and the atmosphere of old-money London, the production team utilized several iconic and exclusive locations. These filming spots are essential entities for understanding the season's aesthetic and topical authority.

The transition to London allowed the series to showcase a different kind of wealth—one steeped in history and tradition, a stark contrast to the modern, tech-focused affluence of Silicon Valley seen in earlier seasons.

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Key London Filming Locations

• Royal Holloway, University of London: This historic and grand campus served as the primary setting for Joe's new academic life, where he teaches as Professor Jonathan Moore.
• Kynance Mews: This picturesque, cobblestone street in South Kensington was used to depict the exclusive, charming, and expensive residential areas where the London elite reside.
• Lincoln's Inn Library: This stunning, old-world library was used for various academic and secretive scenes, adding to the intellectual veneer of Joe's new persona.
• St Pancras International: The iconic train station was used to mark Joe's arrival in the UK and his pursuit of Marienne across Europe.
• Four Seasons Hotel at Ten Trinity Square: Used to portray the lavish, high-end social venues frequented by Lady Phoebe and her friends.

The combination of a stellar new cast, a fresh setting, and an inverted narrative structure—where Joe is being hunted—made *You* Season 4 a refreshing and successful continuation of the Netflix thriller. The casting of established British talent like Charlotte Ritchie and Ed Speleers, alongside American stars like Lukas Gage, ensured the season delivered on its promise to explore a whole new world for Joe Goldberg.