Cillian Murphy has remembered his "Peaky Blinders" co-star Helen McCrory, who died at the age of 52 last year due to breast cancer, naming her as the funniest person he worked with on the sets of the popular crime drama series.

The 45-year-old Irish actor had an interview with BBC Radio 1 on Monday, during which he was asked to drop the name of a co-star who made him laugh the most on-set.

"I would have to say Helen, actually. We were very, very good buddies on that show and she was a very, very funny lady," the 45-year-old Irish actor said. "And, you know, she would make me laugh a lot, I'd have to say."

The actor further shared that it was important for the show to have such laughter rides behind the camera because it was "bloody intense."

"She would take the mickey out of herself as well as taking the mickey out of me," Murphy said. "It's important on this show because a lot of these scenes are so bloody intense and so demanding, sort of psychologically, and you're going places that are difficult enough to go to."

"So you have to have some levity to balance it up, and I always had an amazing laugh with Helen," he added.

Murphy portrays Thomas Shelby in "Peaky Blinders" while McCrory used to play Polly Gray in it.

The series, which premiered in 2013, centers on a powerful local gang of the same name, which is run by Shelby and his family. They earn money from illegal gambling, protection and the black market.

The trailer for its sixth and final season came out in January, and its first episode aired on Sunday.

Besides the "Peaky Blinders" TV show, the actor will also work on a video game based on the series. Apparently, he will lend his voice to "Peaky Blinders: The King's Ransom," which is under pre-production.

The actor is currently filming "Oppenheimer," which is helmed by director Christopher Nolan and slated for release on July 21, 2023.