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The actress and actor, both 25, chatted exclusively with PEOPLE about the new #ShareTheWonder Disney100 campaign — which celebrates 100 years of the Walt Disney Company by encouraging fans to share their favorite Disney memories.
Moretz notes she has "so many memories" from over the years that celebrate her love for all things Disney, but that "there's two in particular that I really loved."
"When I was a really, really young little girl ... [my family and I] went to Orlando, to Walt Disney World, and we stayed on property and everything, and I remember we got to go meet Minnie and Mickey," she says. "I remember how excited and how full of wonder I was, just from the very, very beginning."
"And then, to kind of jump off of that, I would say what's been so magical about living in L.A. and being so close to Disneyland is that I never kind of got to lose that wonder in my life," The Peripheral star adds. "Every single time I'm back in town, the first thing that my friends and I do, and all of us are in our mid to late twenties, is figure out what date that we can all get together and go to Disneyland. ... It's just the best feeling because I feel like I'm four years old again, experiencing Disney all over."
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Mock, for his part, says that visiting Disneyland regularly as a child was a highlight of his younger years and one of his top Disney memories.
"My earliest memory, and one of my favorite memories, is growing up in Hawaii and going to visit my dad's parents, my grandparents, in Anaheim, and obviously, that's close to Disneyland," he says.
"It was always the highlight for me and my little brother as kids, knowing we were going to see family, but also, more importantly, going to Disneyland," Mock adds with a laugh. "That was the highlight every year because we didn't really leave Hawaii that often."
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The Gossip Girl reboot star and Moretz consider themselves big Disney fans and love all that the iconic company encompasses — from its incredible lineup of movies and television shows to its theme park attractions across the globe, as well as the various products they sell.
Reflecting on what makes Disney the best, Moretz says, "They don't take it lightly when they say it's 'The Happiest Place on Earth.' All the characters in the Disney world, they all stand for something, I think, so strong and powerful, and it's been wonderful to see how they've continued to grow on that over the years."
"I feel like Disney's just so in tune with what [people] like, and they're so consistent with what they put out," Mock adds. "But also, I think it's very relatable worldwide, how you can bring up Disney or Mickey or Minnie anywhere around the world, and everyone's going to know who it is. They either have a relationship with them over television, they have the toys, or they have the clothing."
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With the #ShareTheWonder Disney100 campaign, fans can join Moretz and Mock in reminiscing by sharing their favorite Disney, Pixar, Marvel, Star Wars, 20th Century, and National Geographic memories using two hashtags — #ShareTheWonder and #Disney100 — on social media.
These posts, Disney says, "will honor and spotlight the countless memories Disney and its fans have made together over the past century."
When Moretz and Mock aren't celebrating the Disney magic at one of the company's theme park destinations, the stars each have special mementos they hold dear that allow them to always keep Disney in their hearts.
For Moretz, a Minnie Mouse plush toy is a treasured item. "One of my most precious memories was when I brought home my first Minnie Mouse plush. I adored her, and she came everywhere with me," she tells PEOPLE. "Minnie Mouse in particular has always had such a special place in my heart. When you're a little kid and get to bring your favorite character home — those memories stay with you forever."
Mock, meanwhile, says his favorite piece of Disney memorabilia is a pair of Mickey ears he owns. "The ears are another added accessory to my closet, which is something, as an adult, I didn't think I'd have, but I actually love now," he says. "I think it's funny because, obviously, you wear those, and you wouldn't necessarily think to put those on before you leave the house, but I've started to do that, and it keeps the kid in me on a more playful note."