DC Comics has promised "more superhero fun for girls" after an 11-year-old's heartfelt letter requesting more women in comic books and films went viral.

Comic book fan Rowan took matters into her own hands when she was left frustrated with the amount of female characters in the publisher's products.

In the letter which was uploaded onto blog How Did We Get Into This Mess?, with the permission of her parents, she wrote "I'm a girl, and I'm upset because there aren't very many girl superheroes or movies and comics from DC."

"For my birthday, I got some of your Justice League Chibis. I noticed in the little pamphlet that there are only 2 girl Chibis, and 10 boys. Also, the background for the girl figures was all pink and purple."

"There are Superman and Batman movies, but not a Wonder Woman one. You have a Flash TV show, but not a Wonder Woman one. Marvel Comics made a movie about a talking tree and raccoon awesome, but you haven't made a movie with Wonder Woman," she continued, referring to Marvel's 2014 film Guardians of the Galaxy which featured enchanted characters that were brought to life on the big screen.

"I love your comics, but I would love them a whole lot more if there were more girls. I asked a lot of the people I know whether they watched movies or read books or comics where girls were the main characters, they all said yes."

DC Comics took to it's Twitter page to assure followers that female-specific projects, including a Wonder Woman film, Supergirl TV show were in the works.

Comic book publisher promises more female superheroes after pleading letter from little girl goes viral