Alex Winter appreciates the fact there is "no bulls***" with him and Keanu Reeves

He told The Guardian newspaper: "I knew that this was a mammoth undertaking, and the only reason I felt we could pull it off was that it was the two of us together.

"[Working with Keanu] an immediate sense of comfort. I know I can trust him and he can trust me. We genuinely have each other's backs. There's no bulls***."

Alex compared his dynamic with Keanu as like "being in a band" together.

He added: "It's this fluid give-and-take. Sometimes I'm cooking and he's catching up. Sometimes I'm catching up and he's cooking. Sometimes we're helping each other out of a hole. Sometimes we're just on a f****** groove and we look at each other and go: 'God damn, that was good! Where the f*** did that come from?'"

The Adulthood actor-and-director admitted he had a moment of panic before stepping back on stage for the first time in decades.

He recalled: "I was like: 'Oh, holy s***! What if I'm wrong?

"And I'm looking at Keanu, who's in a similar state of terror. And - well, it would have worried me if either of us were like, 'whatever.' "

But Alex also relishes taking risks creatively.

He said: "One hundred percent. There should be a jumping-out-of-an-airplane [feeling] without, you know, jumping out of an airplane."

Alex made his Broadway debut when he was just 13 years old and has gone on to enjoy success as a movie star, a producer, documentarian and director, but he felt like he had "never left" when he went back to the theatre.

He said: "I've lived like three lifetimes since then. But now being backstage and doing my warm-ups, being in the wings and seeing the stagehands - it feels like I never left. It's like a complete time-bend."