Channing Tatum "peed on" Amanda Seyfried's leg and then "ran away" while they were filming Dear John

She told Deadline.com: "He and I effed with each other the entire movie in a super, super fun way. He's very, very funny, and we had a great time.

"He peed on my leg once, without me knowing. He peed on my leg on the beach, and I didn't realize at first, and then I was like: 'Oh, that's why he's standing so close to me.'

"There was a coffee cup very close by, and a little bit got in the coffee cup, and he ran away as I was screaming. One of the make-up artists picked it up and was about to drink it, and I saved her."

Despite having a great time together onset, Tatum later revealed he thought the movie - about a long-distance relationship between a soldier and a college student - was too "generic".

In an appearance on YouTube show Hot Ones, he said of the film: "[It was] such a generic' romance."

He also admitted actors often have to "make bad things" to pay the bills.

Tatum explained: "I think, now, when you get asked to do a movie, or you're trying to get a movie made, it's a very confused pipeline of possibilities.

"And it really feels like, at times, that you're incentivized to make bad things to get paid, rather than make something really, really good, for the f****** people that actually get to see these things and people that I want to see these movies, the person that I was when I was a kid. And I want good movies."

He went on to add that he hopes "streamers" can change the movie industry for the better, adding: "I'm like: 'Man, I want to give my money to the good movies.' It's such an upside-down moment, but I do believe that the disruption is going to lead to something good.

"I do believe that. I do believe the streamers came in for a reason, and it had to change, it had to morph."