Anthony Michael Hall is fessing up to some risky teenage business of his.

Hall, who played Rusty Griswold in the 1983 comedy National Lampoon’s Vacation, joined his cast mates Beverly D’Angelo, Dana Barron, Christie Brinkley, at Fan Expo Chicago this past weekend. Due to the ongoing SAG-AFTRA strike, the actors had to road trip around the subject of the actual movie.

According to Entertainment Weekly, D’Angelo and Brinkley brought up how fans still approach them about growing up and watching their nude scenes.

D’Angelo shared that at fan conventions, she gets “a lot of guys who say [she] was the first boobs they saw.”

Brinkley recalled a more recent experience, saying, “Somebody walked up to my booth yesterday and said, ‘I just love you in the naked scenes.'”

In classic sibling fashion, Barron, who played Rusty’s sister Audrey in the film, ratted out Hall to their cast mates and the audience, telling them that he attempted to sneak onto set to watch D’Angelo, who played his on-screen mother, film a nude scene.

“Should I pick up the story right here?” he offered. “So, I got busted because I tried to sneak onto the set when Beverly was doing the shower scene.”

Hall didn’t reveal any further intel, citing the SAG-AFTRA strike as support for him not continuing the conversation.

Barron then shared that Brinkley was not in fact nude during the pool scene with Clark Griswold (Chevy Chase).

“Christie wore a suit that made her look nude,” she explained, “but she wasn’t nude because she was, or is, a top model and you don’t want to reveal everything, she used to say.”

“I’m still realizing that I was the only person who was really nude,” D’Angelo joked. “Now I’m rethinking my whole life.”

National Lampoon’s Vacation is available to rent or buy on Prime Video.