"Don't go to Vegas with Diddy," Russell told Access Hollywood at the film's premiere at the Greek Theatre in LA on Tuesday night. "That's double Vegas."
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The hip-hop mogul took both Russell and co-star Jonah Hill on separate trips to Sin City, which Russell said was certainly a learning experience.
"Diddy gave me good tips. If you're with Diddy, you're partying. He's a one-man party. He's a fiesta," he said.
Jonah also told Access that he had a wild time with Diddy – but that it was too wild to spill the details.
"Some stuff I can't say on Access Hollywood, nothing I can say in front of my girlfriend, unfortunately," he laughed.
As for Diddy himself, he downplayed the cast's crazy outings.
"Yeah, yeah, yeah, took 'em to Vegas," he said. "I like to work on our chemistry."
Asked for advice, he kept it simple.
"Just party till you feel like you're about to get sick," Diddy said.
"Get Him To The Greek" gets into theaters on June 4.
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