Lee Ryan was intimidated by Danny Dyer during their first "EastEnders" scene together.
The Blue singer - who made his move into the world of TV soaps as Woody Woodward in 2017 - has previously revealed how the TV hard man (Mick Carter) accidentally punched him in the face during filming, but he also made things difficult by scrapping the rehearsed script.
Speaking to Now Magazine, he said: "I'd really rehearsed, and he walked in and said "all right son, we're going to get rid of that" and he rewrote our script.
"We did a fight scene and he accidentally clocked me in the jaw. He said, "I don't know if I'm sorry I hit you or for the fact that you jumped straight back up!"
The 35-year-old star also revealed he had the chance to head to Walford two decades ago when he was offered a different role, but he was focusing on the "One Love" boy band.
He added: "They actually wanted me to play Jamie Mitchell [instead played by Jack Ryder] 20 years ago. I told them I couldn't, as I'd just joined this band called Blue."
Lee left the soap in June last year, and he has admitted he sometime found it hard to believe he was actually getting to act in Albert Square.
He said at the time: "I've had a few of the cast texting me asking if I'm going to come back and I said, "I don't f***ing know."
"But yeah, maybe. I think people were quite shocked I could act, and to be honest I was quite shocked, too. I loved the whole cast and it was a privilege to work on.
"I'd be doing scenes with Phil Mitchell [Steve McFadden] and I would find myself laughing and saying, "We're on "EastEnders"."
"Most of them have been there half their lives, so they'd look at me and be like, "Alright mate," and walk off."