Marvel star Michael Peña has opened up about his "nerve-racking" role in Jack Ryan season 4.

Peña is joining the Prime Video series as Domingo 'Ding' Chavez — a CIA agent who recurs in both the Jack Ryan novels and Tom Clancy's Rainbow Six universe

While Peña has some experience playing franchise characters — he played Scott Lang's pal Luis in the Ant-Man movies and DEA agent Kiki Camarena in Netflix's Narcos: Mexico — he admitted to Digital Spy that he had trepidations about playing Ding

"I mean, you watch the show, and it's a great show. And John is fantastic in it," he said. "And I've binged it in two days, the first season, and I thoroughly enjoyed it

So to be honest with you, you just kind of don't want to mess it up."

The actor went on: "You don't want to mess up something that's like a successful train. So you study up as best as you can, and then you have to let it go. But sometimes that letting go can be a little bit difficult.