Mark-Paul Gosselaar and Breckin Meyer had previously revealed that Cloris Leachman would be on Franklin and Bash, but who else will be guest starring on the TNT series? Mike Tyson!

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Meyer admitted he didn't know how Tyson would be on the show. "He's super sweet and great, but when he first comes on set, you don't know how he's going to be," Meyer told PopSugar on Thursday. "Mike Tyson got real method on the first take." Meyer meant that when you hit Tyson, "he doesn't like it and gets really angry."

Gosselaar then said that he and the rest of the crew stepped back after they saw what was happening between Meyer and Tyson.

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"I went through puberty right there and peed a little bit," Meyer joked. "I couldn't take Mike Tyson. He's Mike Tyson."

On Access Hollywood Live the actors had previously said Leachman would be on the show. "Cloris was awesome," Meyer said. "We have many, many photos of her doing obscene gestures."

Coming up on the TNT show, Gosselaar will also be directing an episode that Meyer wrote. Meyer told  Zap2It that Gosselaar was totally up for the task. "There's no question whether he's up for it. He's overdue. He's been talking about directing since NYPD Blue days. It wasn't like he just showed up. It was never like he looked over and didn't seem like he knew exactly like he was doing."

Franklin and Bash airs Wednesdays at 9 p.m. ET on TNT.

Tags: franklin and bash breckin meyer Mark-Paul Gosselaar Mike Tyson TNT