Harvey Guillén Reveals 'Original' Items He Still Has from “What We Do in the Shadows”' Early Episodes (Exclusive)

"I was like, 'If this show doesn't go on, at least I'll have a small piece of its character,' " the 'Wish' voice actor tells PEOPLE

Harvey Guillén won't be letting Guillermo go that easily!

Speaking with PEOPLE recently amid the release of Wish on 4K, Blu-ray and DVD, the 33-year-old actor revealed that he and his What We Do in the Shadows castmates are "in the middle of shooting" the sixth and final season of their hit FX vampire mockumentary series.

Asked whether he'd be taking anything from the set to remember his time by, Guillén jokes while nodding vehemently, "I would not dare. How dare you? I am not going to even acknowledge that."

The actor admits he did snatch his character's "original glasses" from the show's pilot episode, which aired in March 2019.

"I didn't know the pilot would get picked up, but I fell so in love with the character that I was like, 'If this show doesn't go on, at least I'll have a small piece of its character,' " Guillén says.

Related: Harvey Guillén Shares How He Got Casted By Taika Waititi in 'What We Do In The Shadows'

"I like to always take a little piece," he continues. "So I have Guillermo's original glasses from the pilot still with me, and I've been lucky enough to have one of Guillermo's original sweaters. So I have a little bit of him forever."

Luckily for Guillén, What We Do in the Shadows has become quite the supernatural sensation. Created by Flight of the Conchords' Jemaine Clement and based on the 2015 film of the same name (which Clement, 50, co-directed with Taika Waititi), the show follows the everyday lives of four vampires in Staten Island, New York, who struggle to fit in with the human world, with many hilarious hijinks along the way.

Guillén plays Guillermo de la Cruz, a mild-mannered familiar to vampire Nandor the Relentless (real-life best friend Kayvan Novak) with a lifelong goal of becoming a vampire himself — only to find out that he is descended from famous vampire hunter Van Helsing.

The show also stars Matt Berry as Laszlo Cravensworth, Natasia Demetriou as Nadja of Antipaxtos, Mark Proksch as "energy vampire" Colin Robinson and Kristen Schaal as The Guide, among many recurring and one-off guest stars like Beanie Feldstein, Nick Kroll, Mark Hamill, Fred Armisen, Doug Jones, Vanessa Bayer, Haley Joel Osment, Sofia Coppola, Patton Oswalt and even Waititi, 48.

Related: Harvey Guillén Says Friendship with Ariana DeBose Is 'Opposite' of Their Wish Characters (Exclusive)

While "it's hard to hang out as a group" for Guillén and his castmates, since most of them live in the U.K. and he's based in Los Angeles, they still make time for one another off set when they can.

"Whenever we're working, Kayvan and I go to dinner. We have little buddy brunches," says the Blue Beetle actor. "I'm really close to him and his fiancée."

"And we plan dinners. When I went to London, I stayed in their flat and they cooked me dinner. So I think that by luck, we became familiar and master, and by choice, we became best friends," he adds.

Guillén tells PEOPLE that the Shadows cast and crew "haven't had a wrap party in years," due to the COVID-19 pandemic that erupted early on in the show's tenure.

That being said, the series finale might just be the perfect time to hold the biggest and best bash there is. "I think this might be our last year that we can do that. So here's hoping," Guillén says.

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Season 1 through 5 of What We Do in the Shadows are streaming on Hulu.

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