Cole Sprouse and Dylan Sprouse once had a fist fight in a dressing room before shooting 'The Suite Life of Zack and Cody'.
The 31-year-old actor and his twin brother starred on the Disney Channel series between 2005 and 2008, and Cole has now admitted that their off-camera relationship has been tense at times.
He told E! News: "We had a vicious fist fight one time. This is puberty. Brothers fight. We were like, scrapping in the back, we were taking it through the hallways, like wrestling and fighting."
Cole admitted that their fight featured "WWE moves".
He recalled: "We got a knock on the dressing room door, and the door opens and it's a fan. She was like, 'Hey, would you mind if I took a picture with you?'
"And Cole goes, 'Do you want to come back in five minutes?' And she's like, 'Yeah, sure'. She shuts the door and we both busted out laughing so hard, we didn't even know why we were fighting. But that's brothers for you."
Meanwhile, Cole previously described himself as being "violently defensive" of other child stars.
The actor played the part of Jughead Jones on the hit TV series 'Riverdale', and Cole admitted that the show reminded him of his own childhood experiences.
He told the New York Times newspaper: "When we talk about child stars going nuts, what we're not actually talking about is how fame is a trauma.
"So I'm violently defensive against people who mock some of the young women who were on the channel when I was younger because I don't feel like it adequately comprehends the humanity of that experience and what it takes to recover.
"And, to be quite honest, as I have now gone through a second big round of this fame game as an adult, I've noticed the same psychological effects that fame yields upon a group of young adults as I did when I was a child."