However, the funnyman can't stop gushing about his new on-screen romance with Rose Byrne.
"Getting the romance with Rose was a pretty good perk for my character," the 44-year-old told E! News. "I felt like we did have chemistry."
Byrne couldn't agree more and argued the attraction was instant.
"We hit it out of the park, didn't we?" the actress joked. "Come on, buddy."
Even Vaughn admits Wilson received a great actress to romance this time around. After Byrne appeared at the film's premiere in a "eat your heart out, Owen" dress, the actor argued the look was enough to stop traffic.
"Nobody told us a young Elizabeth Taylor was showing up," Vaughn said as his costars laughed. "You think you would get a memo or a heads up, am I right?"
Watch the sparks fly when The Internship hits theatres this Friday!