Halloween calls for costumes — and an even happier Halloween may mean pets are joining in on the fun.

Fox News Digital readers and staff members submitted images of family pets sporting their trick-or-treating best, from cats and dogs transforming into Santa Claus, insects, superheroes and more.

See the adorable images and fun facts about some of these pets below.

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Pompeii, a pug from Cleveland, Ohio, impressed plenty with her flower costume this Halloween.

Baker, a mini golden doodle, is dressed as a cowboy while his pal Aspen, a black lab, is dressed as a scary shark.

Teddy, a hava-malti-poo from New York, is energetic and a social butterfly who loves everyone he meets, his owner tells Fox News Digital.

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Alice, a cuddly and friendly golden retriever from New York, is dressed in a lion costume.

Parker, a cat from New York, dressed as a convict for Halloween 2022. 

His crime for being a "bad pet"? Biting! 

Quinn, a long-haired chihuahua, is "the happiest little girl" and spreads love everywhere she goes, according to her owner.

Zion is a golden retriever from Indianapolis, Indiana — and he is a banana and a panda this Halloween.

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Chino the yorkie of Cleveland, Ohio, is in the Christmas spirit this Halloween as he dons the classic red suit of Santa Claus.

Oona, 2 and Wendell, 10, both golden retrievers, pose for their photo on Oct. 31, 2022.

Oona is dressed as a watermelon — while Wendell sports a dinosaur costume.

Boomer is owned by a pair of married Boston Bruins fanatics — so he wears a Bruins jersey every year on Halloween to support his ice hockey team. 

Boomer cheers his team on from his home in Apex, North Carolina.

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Sinatra, an American bully, is dressed in an elf costume while celebrating at home in Cleveland, Ohio.

Louis is a cavachon from Seven Hills, Ohio. 

This year, Louis is dressed as a UPS delivery worker.

Ollie is a 16-week-old mini goldendoodle who lives in Manhattan. 

Ollie wore a soft, blue shark costume this Halloween.

Noki of Chicago, Illinois, is a cavapoo. Noki is dressed as a lion for Halloween.

Molly, a sweet and vocal dachshund from Upstate New York, is dressed as Cookie Monster for Halloween — complete with a chocolate chip cookie.

Phoebe is a chihuahua from Cleveland, Ohio. 

Pheobe is wearing a sombrero and a colorful poncho.

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Storm, a German shepherd, is from Long Island, New York. 

Storm is very energetic. She loves to spend time outdoors and chase after bugs, her family tells Fox News Digital.

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Rusty, 5, and Simba, 4 — cats from New York — wear pumpkin pet costumes for Halloween.

Bentley, a black lab/rottweiler mix from Pittsburgh, Pennsylvania, is also dressed as a superhero this Halloween.

Boomer, a mixed pup from Massachusetts, is dressed as a cowboy for Halloween — complete with a hat and bandana.

Mully, a mixed-breed dog also from Massachusetts, poses in a Buzz Lightyear costume from the "Toy Story" movie franchise.

Milo, a havapoo (havanese poodle) from New Jersey, is dressed up as a hot dog with mustard for Halloween.