Monday night’s premiere of New Line’s “Vacation” at the Regency Village in Westwood left no doubt that the comedy had easily earned its R rating.

“I get to say the F word a lot,” admitted 11-year-old Steele Stebbins on the red carpet. “I got used to swearing.”

Christina Applegate, who plays Debbie Griswold, the spouse of Ed Helms‘ Rusty Griswold, however, said that it’s difficult for her to be offended after portraying Kelly Bundy for a decade on “Married… With Children.”

“Nothing shocks me,” she asserted. “This film is like a distant dirty cousin to the others.”

The evening was full of homage to Chevy Chase — who nursed an arm injury in a sling — and Beverly D’Angelo, who reprise their iconic roles as Clark and Ellen Griswold. In the film, their son Rusty decides to reenact the trip to Walley World from 1983’s “Vacation” for his own family.

“I probably wouldn’t have done it had they offered me Clark Griswold, because that’s sacred,” Helms mused on the red carpet. “But with Rusty, you’re starting out with a blank page.”

Producer Chris Bender, who has daughters aged 10 and 7, admitted that Rusty Griswold’s character is very much like his own. “As a dad, you’re always the eternal optimist,” he said.

The Hemsworth brothers, Liam and Luke, were there to support Chris Hemsworth in his skivvy-baring role. Also in attendance were scripters and first-time directors John Francis Daley and Jonathan M. Goldstein (who were announced as the screenwriters of the “Spider-Man” reboot), Warner Bros. Entertainment chief Kevin Tsujihara, Applegate’s TV brother David Faustino and Carrie Fisher.

For the post-screening bash, attendees walked outside the theater to a mini-Walley World with carnival games, rides and food, with the Griswold family’s green and wood-paneled station wagon parked out front.

“Vacation” opens July 29.

(Pictured: Chevy Chase, Beverly D’Angelo, Christina Applegate, Steele Stebbins, Skyler Gisondo, Chris Hemsworth and Ed Helms at New Line Cinema’s “Vacation” premiere)

Review: Film Review: ‘Vacation’