Captain Underpants

Captain Underpants fan gear with a playful retro cartoon look, made for readers who want to show off their favorite hero in style. Shop Captain Underpants T-shirts for bold designs, everyday comfort, and officially licensed pop culture apparel that brings the laughs.

From running and flying graphics to Tra La Laaa and comic-inspired artwork, this collection of Captain Underpants shirts makes it easy to find a favorite for kids, teens, and grown-up fans. Browse fun, nostalgic tees built for casual wear, gifting, and collecting.

Captain Underpants
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  • Ginger Captain Underpants t-shirt featuring Captain Underpants Circle Stars design

    Captain Underpants T-Shirt - Circle Stars

    Captain Underpants T-Shirt - Circle Stars
    $23.75
    $23.75
  • White Captain Underpants t-shirt featuring Captain Underpants Tra La Laugh design

    Captain Underpants T-Shirt - Tra La Laugh

    Captain Underpants T-Shirt - Tra La Laugh
    $23.75
    $23.75
  • Comic Captain Underpants t-shirt in white

    Captain Underpants T-Shirt - Comic

    Captain Underpants T-Shirt - Comic
    $23.75
    $23.75
  • White Captain Underpants t-shirt featuring Captain Underpants Flying design

    Captain Underpants T-Shirt - Flying

    Captain Underpants T-Shirt - Flying
    $23.75
    $23.75
  • Royal blue Captain Underpants t-shirt featuring Captain Underpants Tra La Laaa design

    Captain Underpants T-Shirt - Tra La Laaa

    Captain Underpants T-Shirt - Tra La Laaa
    $23.75
    $23.75
  • Light blue heather Captain Underpants t-shirt featuring Captain Underpants Running design

    Captain Underpants T-Shirt - Running

    Captain Underpants T-Shirt - Running
    $23.75
    $23.75

Questions

Who created Captain Underpants?
Author and illustrator Dav Pilkey created the series, launching the first book in 1997.
What is the series actually about?
Two fourth-grade prankster best friends accidentally bring their homemade comic book superhero to life, and their principal keeps turning into him.
Who are George and Harold?
George Beard and Harold Hutchins are best friends at Jerome Horwitz Elementary School in Piqua, Ohio, who run Treehouse Comix, Inc. and draw the Captain Underpants comics.
How does Captain Underpants come to life?
George and Harold hypnotize their mean principal, Mr. Benjamin Krupp, with a hypno-ring, so whenever someone snaps their fingers he becomes the superhero.
What does Captain Underpants wear?
Just white briefs and a red polka-dotted cape, which is exactly the point of the joke.
How do you turn the principal back to normal?
Water reverses the transformation and snaps him out of superhero mode.
What is his catchphrase?
Captain Underpants shouts "Tra La La!" as his signature exclamation.
How many books are there?
As of 2026 there are 12 main novels plus 6 activity books, along with more than a dozen spin-off titles.
How many copies has the series sold?
The series has sold over 90 million copies worldwide and been translated into more than 37 languages, with more than 50 million copies sold in the US alone.
Is it true these books get banned?
Yes, Captain Underpants was the single most-challenged title in the United States in both 2012 and 2013, according to the American Library Association, often cited for offensive language.
Are there any LGBTQ+ characters?
In the twelfth book, an adult Harold is shown with a husband named Billy and twin adopted children, and one Michigan school reportedly pulled the book from a 2015 book fair over the same-sex marriage reference.
Who are the villains?
Foes include Professor Pippy Pee-Pee Poopypants (later called Tippy Tinkletrousers) and the Talking Toilets.
Is there a Captain Underpants movie?
Yes, DreamWorks Animation released Captain Underpants: The First Epic Movie in 2017, with Kevin Hart and Thomas Middleditch voicing George and Harold.
Was there a TV show?
Netflix ran The Epic Tales of Captain Underpants from 2018 to 2020.
Why was there such a long wait between books?
Pilkey had a roughly six-year gap between books eight and nine (2006 to 2012) while caring for his terminally ill father, who reportedly passed away in 2008.
Did Captain Underpants lead to Dog Man?
Yes, Pilkey launched the hugely popular Dog Man spin-off in 2016, which grew into stage musicals and a 2025 film.