Aaron Blabey (born January 1, 1974) is an Australian author of children's books.

He is the creator of three best-selling children's series; Pig the Pug – a picture book series about a rude, selfish, mean-spirited little dog, The Bad Guys – a New York Times #1 bestselling graphic novel series for junior readers about a gang of scary-looking animals trying to change their bad reputations and Thelma the Unicorn – a second picture book series about a plain little pony who pretends to be a unicorn.

As of December 2021, Blabey has around 30 million books in print and his books have spent over 120 weeks on the New York Times Bestseller List. The Bad Guys first reached #1 on the list on July 3 2019.

On April 22, 2022, an animated movie adaptation of The Bad Guys from DreamWorks Animation starring Sam Rockwell, Awkwafina, Marc Maron, Craig Robinson and Anthony Ramos premiered in the United States. Blabey served as an executive producer on the movie with Patrick Hughes and Etan Cohen.

In May 2019, it was announced that Netflix are developing a movie-musical adaptation of Thelma the Unicorn with Blabey again serving as executive producer.

Until 2005, Blabey was also an actor. In the field of acting, he is probably best known for his lead roles in two television dramedies, 1994's The Damnation of Harvey McHugh, for which he won an Australian Film Institute Award, and 2003's CrashBurn,^[1] before retiring from performance in 2005.