The Arconia's New Neighbors: A Full Guide To The Only Murders In The Building Season 4 Cast And Shocking Guest Stars

The latest season of Only Murders in the Building is set to bring a fresh wave of mystery, star-studded cameos, and, of course, murder, right to the heart of the Arconia and beyond. As of the current date, December 10, 2025, the anticipation for Season 4 is at an all-time high, especially with the news of an all-new, incredible ensemble cast joining the beloved trio. The upcoming season is confirmed to see Charles, Oliver, and Mabel take their true crime podcasting skills to Los Angeles before returning to solve the latest shocking murder in their iconic New York apartment building.

The series, which has captivated audiences with its blend of cozy mystery and sharp comedy, owes its success to the unparalleled chemistry of its leading stars. However, the show's tradition of featuring A-list guest stars is what truly sets it apart, and Season 4 is raising the bar even higher. This is your complete, updated guide to every actor, comedian, and musical star confirmed for the next chapter of the Hulu hit.

The Core Trio: Charles, Oliver, and Mabel’s Updated Biography Profiles

The heart of Only Murders in the Building (OMITB) is the unlikely friendship between three residents of the Arconia, each bringing a distinct flavor of celebrity, neurosis, and brilliance to the true crime podcast world. Here is a look at the legendary actors behind the main characters.

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Steve Martin as Charles-Haden Savage

Steve Martin, a true comedy legend, plays Charles-Haden Savage, a semi-retired actor best known for his 1990s crime procedural role, "Brazzos." His deadpan delivery and deep-seated insecurities provide much of the show’s subtle humor. Martin's career spans decades, earning him accolades including five Grammy Awards, a Primetime Emmy Award, and an honorary Oscar.

• Full Name: Stephen Glenn Martin
• Born: August 14, 1945, in Waco, Texas
• Key Achievements: Mark Twain Prize for American Humor (2005), Kennedy Center Honors (2007), Academy Honorary Award (2013).
• Fun Fact: Beyond acting and comedy, Martin is an accomplished banjo player and bluegrass musician, often touring and releasing albums.

Martin Short as Oliver Putnam

The exuberant and theatrical Oliver Putnam is brought to life by the incomparable Martin Short. Oliver is a perpetually optimistic, financially struggling Broadway director whose dramatic flair is the driving force behind the podcast. Short, a Canadian-American comedian, is a celebrated performer with a long history in television comedy, including *SCTV Network* and *Saturday Night Live*.

• Full Name: Martin Hayter Short
• Born: March 26, 1950, in Hamilton, Ontario, Canada
• Key Achievements: Tony Award for *Little Me* (1999), multiple Primetime Emmy Awards, and two Screen Actors Guild Awards for his work on *OMITB*.
• Fun Fact: Short was made an Officer of the Order of Canada in 2019, one of the nation's highest honors.

Selena Gomez as Mabel Mora

Selena Gomez plays Mabel Mora, the young, stylish, and mysterious artist with a deep, personal connection to the Arconia's history of murder. Gomez’s portrayal of Mabel is often credited with grounding the series, connecting the old-school comedy of her co-stars with a modern, millennial sensibility. She is a powerhouse singer, actress, and producer.

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• Full Name: Selena Marie Gomez
• Born: July 22, 1992, in Grand Prairie, Texas
• Key Achievements: Multiple American Music Awards and MTV Video Music Awards for her music career. She became the first Latina to be nominated as a producer at the Emmy Awards for an Outstanding Comedy Series for *OMITB*.
• Recent Projects: She is also set to appear in *The Wizards of Waverly Place* sequel/spin-off, reprising her breakthrough role as Alex Russo.

The Shocking New Guest Stars and Returning Favorites for Season 4

Season 4 of Only Murders in the Building promises to be the most star-studded yet, following the shocking murder of Charles's stunt double, Sazz Pataki, at the end of Season 3. The new mystery takes the trio to Los Angeles, bringing them into contact with a fresh batch of Hollywood elite and potential suspects.

The New Faces Joining the Mystery

The addition of these major stars solidifies *OMITB*'s status as a must-watch series, with each new character potentially playing a key role in Sazz Pataki’s murder or the in-universe movie about the trio's podcast.

• Molly Shannon as Bev Melon: Shannon, a *Saturday Night Live* alum and celebrated comedian, is set to play a significant new character: Bev Melon, a high-powered Paramount studio executive. Melon is reportedly the person responsible for bringing the trio’s podcast to the big screen, a plot point that will undoubtedly drive much of the season’s action.
• Eugene Levy as Himself (or a Version of Charles): In a brilliant piece of meta-casting, *Schitt's Creek* star Eugene Levy will appear in the series. He is rumored to play Charles-Haden Savage in the in-universe movie adaptation of the *OMITB* podcast, adding a hilarious layer of self-reference to the show.
• Eva Longoria: Known for her role in *Desperate Housewives*, Longoria joins the cast in a recurring role that remains shrouded in mystery, leading to massive speculation about her character's connection to the murder.
• Zach Galifianakis: The comedian from *The Hangover* franchise is also confirmed for Season 4, adding another major comedic talent to the ensemble.

Returning Stars and Potential Suspects

The Arconia would not be the same without its rotating cast of recurring characters, many of whom are returning for Season 4, either as suspects, allies, or victims of the latest murder investigation.

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• Meryl Streep as Loretta Durkin: The legendary actress will reprise her role as Loretta, Oliver's love interest and a former murder suspect herself. Her return confirms that the romance between Loretta and Oliver will continue, providing a vital emotional anchor to the series.
• Jane Lynch as Sazz Pataki: While Sazz was the victim of the Season 3 finale, Jane Lynch is confirmed to return. This strongly suggests that Sazz will appear in flashbacks, providing the trio with clues about her life and the identity of her killer, or perhaps even in the form of a ghost, given the show's quirky nature.
• Amy Ryan as Jan Bellows: The infamous Season 1 killer, Jan, is also set to return. Her presence, likely from prison, could offer the podcasters an expert perspective on murder from the other side of the law, or she could simply be there to taunt Charles.
• Michael Cyril Creighton as Howard Morris: The quirky, cat-loving Arconia resident and now Charles’s assistant, Howard, is expected to return, providing his unique brand of nervous comic relief and local Arconia gossip.

The Star-Powered Cameos: Who Else is in the Building?

Part of the fun of watching *OMITB* is the parade of surprise cameos. Season 4 is no exception, featuring a mix of Hollywood directors, comedians, and sports figures in roles that are likely to be self-referential and hilarious.

A-List Cameos Confirmed for Season 4

The list of confirmed and rumored cameos further illustrates the show's incredible pull within the entertainment industry:

• Melissa McCarthy: Another comedic heavyweight joining the ensemble, McCarthy's role is currently unknown but is expected to be a memorable cameo.
• Scott Bakula: The star of *Quantum Leap* and *Star Trek: Enterprise* is confirmed to appear, adding to the list of classic TV stars.
• Ron Howard and Téa Leoni: Both are listed as appearing in Season 4, likely as themselves or in roles tied to the in-universe movie production, given their Hollywood backgrounds.
• John McEnroe: The tennis legend is set to make an appearance, continuing the show's tradition of including sports figures in its New York City setting.
• Griffin Dunne and Richard Kind: These veteran actors are also confirmed for roles, adding more seasoned talent to the growing list of Arconia residents or Hollywood players.

With the main trio returning, a fan-favorite like Meryl Streep back in the mix, and the introduction of major new players like Molly Shannon and Eugene Levy, the stage is set for a truly epic Season 4. The blend of a New York murder mystery with a Hollywood twist, thanks to the LA storyline and the in-universe movie, ensures that the next chapter of the *Only Murders in the Building* true crime podcast will be its most ambitious yet.