Going along with being a teenager trapped in a man's body, Rob and his sons celebrated the actor's 53rd birthday by paying a visit to the house where he filmed The Outsiders in 1983, which has now been turned into a museum dedicated to the beloved movie.
"[The museum] has some of my wardrobe [from the movie]," Lowe reveals. "I was like, 'Dare I try to put on my 18-year-old shirt? And I did and it worked!"
"So, it was the best birthday gift I ever got," he notes. John Owen also tried on the shirt and it, too, looked great on him.
Rob and his sons recently filmed a show for A&E, The Lowe Files, with their dad, where they went on the road to investigate America's spookiest urban legends.
Back in 2015, ET caught up with the Lowe guys, and the proud dad joked about having some competition in the handsome department. "Listen, I'm fully embracing the old man moniker," he quipped. "They're hot, they're young, they're on it. I'm old. I'm on my way out, everybody knows it."