The Frozen and Mindhunter star takes on a key role in this week’s episode, Rogue.

American stage and screen actor Jonathan Groff made his name as the star of Hamilton, Frozen, Mindhunter and Glee — but now he’s about to enter a different universe (or Whoniverse) as a mysterious character called Rogue in Doctor Who.

In a break from the Regency dancefloor, Radio Times and other press caught up with Groff during filming of the new episode to find out why he chose Who as his first foray into British TV.

Jonathan, what made you switch from Broadway to south Wales?

“I was familiar with Russell T Davies’s work from Queer as Folk and It’s a Sin. I’m still crying about It’s a Sin years after watching it. Russell has meant a lot to me as a gay actor through the years. So, when he wrote me a letter to invite me on the show, that drew me into it.

“When I read the script, I hadn’t yet seen an episode of Doctor Who and I had never shot anything in the UK. But the script really grabbed me. I was quite breathless reading it. I’ve been getting an education on Doctor Who ever since.”

Were you aware of what a big deal Doctor Who was before you got the part?

“When they announced the casting of this episode, my phone was blowing up with people reaching out to me from all over the world, telling me, ‘Oh my God, you’re in Doctor Who. I’m freaking out’ – almost more than anything. So I am now starting to comprehend the epic-ness of the show.”

Read the full interview at Radio Times