Why Did Adam Driver Finally Say Yes to Marvel? What He Told Kimmel About X-Men, Who Nathaniel Milbury Really Is, and Why I Think “I Don’t Want to Mess It Up” Is the Best Casting News the Franchise Has Had

Most actors who turn down Marvel never have to explain themselves. Adam Driver did, because the man who runs Marvel Studios turned the refusals into a running joke. In July, Kevin Feige described Zooming with Driver and hearing him pass as “a long-lived tradition.” A few weeks later, at D23, the tradition ended.

On Thursday night, Nov. 5, Jimmy Kimmel asked the obvious follow-up: why this one? Driver, who was on the show to promote James Gray’s Paper Tiger, gave an answer I keep coming back to. It wasn’t a victory-lap answer. It was a fear answer, and I think that’s the most interesting thing anyone has said about the new X-Men so far.

What Driver actually told Kimmel

The comments come at about the 3:40 mark of the Kimmel segment, according to AV Club, and they break down into four separate reasons. I’ve paraphrased most of them and kept only the shortest quotes.

That last reason also explains the earlier refusals better than any studio spin could. If you believe a film can embarrass you in front of millions of people, saying no to a dozen Marvel pitches isn’t arrogance. It’s risk management.

From “tradition” to D23: how the holdout ended

The timeline is short, and it’s a nice reminder of how wrong the rumor mill can be.

• Mid-July 2026Insider accounts claimed Driver was in talks to play a villain in the X-Men reboot, and one of them specified Magneto. Marvel confirmed none of it, and it turned out to be wrong about the character.
• About July 20Feige said on the Happy Sad Confused podcast that Marvel had approached Driver many times, and that the Zoom-then-pass routine had become tradition, as reported by Variety and others.
• Mid-August, D23 in AnaheimMarvel presented the new X-Men cast. Driver “crashed the panel” with a video, per Marvel’s statement, announcing that he’d play a very sinister figure named Nathaniel Milbury.
• Thursday, Nov. 5Driver explains the yes on Jimmy Kimmel Live!
• 2027Filming is expected to happen next year, according to Dark Horizons. Driver’s next film, per the same report, is Michael Mann’s Heat 2, where he plays the villain, shooting across the first half of 2027.
• May 5, 2028X-Men opens exclusively in theaters.

I like that the real casting was stranger than the leak. Magneto is the obvious villain for anyone who has seen the Fox films. Marvel went somewhere else, and I’ll argue below that it was the smarter call.

Nathaniel Milbury, decoded

Here is the name puzzle in one picture. Marvel’s own statement said Driver would play “Nathaniel Milbury,” a name most casual fans have never heard. Comics readers recognized it right away.

Why does this matter for the movie? Because Sinister’s obsession in the comics is the Summers and Grey bloodlines. He experiments on Cyclops and his family, and he created Madelyne Pryor, a clone of Jean Grey who later gave birth to Nathan Summers, the future Cable. The film’s cast includes Kit Connor as Scott Summers and Sadie Sink as Jean Grey. That overlap is hard to ignore.

How sure is the Sinister part? Reports differ slightly on how direct Driver was. ComicBookMovie says he confirmed on Kimmel that he’s playing Mister Sinister. Laughing Place says he repeated the name Milbury and that Kimmel was the one who noted the comic-book link. The Popverse pointed out shortly after D23 that Marvel’s own wording avoided the Sinister name. So nearly everyone outside Marvel treats this as Sinister, and so do I, but the studio’s official language is still Milbury, and I can’t tell you what the movie does with that name.

Who is standing next to him

The film is directed by Jake Schreier, who directed Thunderbolts*, and Collider lists Joanna Calo, Lee Sung Jin and Michael Lesslie as the writers. The cast announced so far, per ComicBookMovie:

Two gaps stand out. AV Club notes the film still hasn’t cast its Magneto, and there’s no announcement for Wolverine either. If you want the longer casting picture, I’ve already covered the report on Ben Wang as Iceman and the Rogue accent debate.

My take: fear is the best reason an actor can give

Think about what franchise actors usually say. It’s an honor, it’s a dream, it’s a family. Those answers aren’t lies, but they’re so smooth that they tell you nothing. Driver gave the opposite answer. He said the thing every nervous performer thinks and almost none will say on a talk show: if this goes badly, everyone will see it. I trust that more than any press-tour enthusiasm, because an actor who’s afraid of ruining the part is usually an actor who will sweat the details.

The role choice impresses me too. Magneto would have been the safe prestige-villain pick, and it would have dragged the reboot straight back into the shadow of the Fox films. A scientist who treats mutants as raw material is a different kind of threat, one that makes the story about the team’s own bloodlines rather than a political argument we’ve already seen onscreen. It also fits the actor. Driver has built a career out of playing men whose intensity is the scariest part of them, and Sinister is a character that lives or dies on cold, patient menace.

Now the criticism. I wish Marvel would stop playing coy with names. Announcing a “very sinister figure named Nathaniel Milbury” and letting fans do the detective work is clever for about a week, and then it turns into homework. And a great actor can’t fix a thin script. Driver himself called the script really cool, but he also read it with every reason to like it, so I’m treating that as encouraging rather than proof.

Still, I come away more optimistic than I was before Thursday. A reluctant actor who finally commits, and who tells you honestly why, is the best kind of casting news.

My Sinister scorecard

These grades are my opinion, not data. They judge the casting news, not a movie nobody has seen.

What nobody has said yet

• How Sinister will look on screen, and whether the comics’ high collar and cape survive.
• Whether “Milbury” is a cover identity Essex uses or a straight rename of the character.
• How large Driver’s role is in a film with a big team cast.
• Who plays Magneto and Wolverine, if either appears at all.
• The exact start date of filming. “Next year” is all that has been reported.

If you’d like to see Driver’s range before then, Paper Tiger is the better test. I wrote about the critics’ split on that film, and nearly everyone who mentioned his performance liked it.

Quick answers