House of the Dragon Season 4: Pre-Production Reportedly Underway as Gayle Rankin Confirms Alys Rivers Returns

House of the Dragon’s fourth and final season is moving into physical production. Industry production reports place pre-production and set construction at Warner Bros. Studios Leavesden from this month, and Gayle Rankin has confirmed she returns as Alys Rivers, in comments that also back up the early 2027 filming timeline.

What is confirmed, and by whom

The big-picture facts are on the record. HBO chairman and CEO Casey Bloys confirmed in a January interview with Deadline that Season 4 concludes the series, answering the direct question with “yes, that is the idea” and pointing to the Targaryen history’s natural end point. Showrunner Ryan Condal told Empire in mid-August that the production is on schedule, with prep beginning this autumn and principal photography starting in early 2027. Bloys has previously slotted the season for a 2028 release.

The October start at Leavesden sits one step below that on the sourcing ladder: it comes from industry production tracking rather than an HBO announcement, so treat the exact timing as reported, not official. It is, however, consistent with Condal’s own stated schedule, and Leavesden is where Season 3 shot from March to October 2025.

Rankin confirms Alys Rivers returns

Speaking to The Direct this week while promoting her film The Incomer, Rankin confirmed she will be involved in the final season, and noted that Alys and Aemond are both still alive as Season 3 leaves them, with more of their story to tell. She gave away nothing about where that story goes, but her added comment that cameras roll “early next year” independently matches Condal’s Empire timeline.

For readers of Fire & Blood, Alys’ continued presence is no surprise: the witch of Harrenhal’s largest chapters sit in the stretch of the Dance the final season has left to cover. How closely the show follows them is another question entirely, given how freely Season 3 handled the book.

What remains open

Two basics are still unsettled. The episode count has not been announced; Bloys said in January that Condal had not yet landed on a number, and HBO has not updated that since. And no footage, first-look imagery or premiere date exists for the season, which is normal at this stage: Season 3’s first teaser arrived in March 2026 for a June premiere, suggesting Season 4 marketing is more than a year away.

The final season adapts the remainder of the Dance of the Dragons. If the 2028 window holds, the full saga will have taken six years to tell its civil war, with the longest-awaited chapters of the book still ahead of it.