The Gilded Age Season 4: Release date updates, cast news and everything we know so far

The battle for New York society is far from over. Following a successful third season that saw the Russells climb even higher up the social ladder, HBO has officially confirmed that The Gilded Age Season 4 is in the works.

With production moving at a surprisingly rapid pace, here is everything we know about the return of Julian Fellowes’ lavish period drama.

The Gilded Age Season 4 Release Date Updates

In a major surprise for fans, HBO officially confirmed in May 2026 that The Gilded Age Season 4 is scheduled to premiere sometime in late 2026.

This marks a significant shift in the show’s production cycle. While previous gaps between seasons spanned nearly two years, Season 4 was greenlit before Season 3 even finished airing in 2025. Filming for the first four episodes is already underway in New York City as of June 2026.

Given HBO’s current programming slate, insiders speculate a late October or November 2026 premiere to maintain the show’s traditional Sunday night prestige slot.

Season 4 Cast News: Returning and New Faces

The sprawling ensemble of New York’s “Old” and “New” money is set to return, with a few notable promotions in the ranks.

Returning Main Cast

• Carrie Coon as Bertha Russell: The calculating matriarch who continues her ruthless ascent.

• Morgan Spector as George Russell: The railroad tycoon whose business gambles remain central to the plot.

• Christine Baranski as Agnes van Rhijn: Attempting to reclaim her fading influence.

• Cynthia Nixon as Ada Brook: Now established in her new position of authority within the household.

• Louisa Jacobson as Marian Brook: Navigating her upcoming marriage and new future.

• Denée Benton as Peggy Scott: Facing new challenges with her engagement and career.

Casting Promotions

Two fan-favorite recurring characters have been officially promoted to series regulars for Season 4:

The Gilded Age Season 4: Filming updates

The official HBO synopsis for Season 4 carries a dark warning for the elite: “In this new era, you must be careful what you wish for.”

Following the events of the Season 3 finale, the narrative is set to explore the fallout of Bertha Russell’s aggressive social victories. While she has successfully positioned her family at the top of the social hierarchy, the cost of that ambition is starting to fracture her own family unit.

Key storylines for Season 4 include:

• The Russell Family Divide: Bertha’s sacrifice of Gladys’s happiness to secure the Duke of Buckingham’s favor has created a massive rift with George, who may find himself “out of the picture” as Bertha operates independently.

• Gladys’s Pregnancy: The final moments of Season 3 revealed Gladys is pregnant, a development that will fundamentally change her marriage to the Duke and her status in the ton.

• The Brook Household Chaos: Agnes continues to struggle with the power shift in her home as Ada takes over the leadership role.

• The Next Generation: Marian and Larry’s wedding preparations will likely serve as a major social backdrop, while Peggy Scott must navigate her future-in-laws’ disapproval of her career.