Marvel's Moon Girl and Devil Dinosaur (or simply Moon Girl and Devil Dinosaur) is an American animated superhero comedy television series developed by Steve Loter, Jeffrey M. Howard and Kate Kondell for Disney Channel and Disney+ based on the comics by Marvel Comics, The series follows Lunella Lafayette and her dinosaur companion Devil Dinosaur.

The series features the voices of Diamond White, Fred Tatasciore, Alfre Woodard, Sasheer Zamata, Jermaine Fowler, Gary Anthony Williams, Libe Barer, and Laurence Fishburne. Development began after Marvel Studios president Louis D'Esposito showed Fishburne the comic book series Moon Girl And Devil Dinosaur. His interest piqued, having been a fan of the original Moon-Boy and Devil Dinosaur, Fishburne sought to make an animated series based on the duo. Production proceeded for two years before Steve Loter was hired as an executive producer. After a successful pitch to Disney Television Animation executives, the series was greenlit and publicly announced in February 2018. It is produced by Cinema Gypsy Productions, Disney Television Animation, and Marvel Animation, with animation by Flying Bark Productions.

Marvel's Moon Girl and Devil Dinosaur premiered on Disney Channel on February 10, 2023, and was released on Disney+ five days later. In October 2022, ahead of the series premiere, the series was renewed for a second and final season. The series received highly positive reviews for its writing, animation, soundtrack, representation, and characters. The series won five Children's and Family Emmy Awards. The second and final season was split into two parts, with Part 1 premiering on February 2, 2024, and Part 2 premiering on February 6, 2025, with the show airing its final episode on March 8, 2025. A crossover with Spidey and His Amazing Friends, "Moon Girl and the Dino Dilemma", aired on November 15, 2024, with White and Tatasciore reprising their roles.

Lunella Lafayette is a 13-year-old genius living with her parents and grandparents on the Lower East Side of Manhattan in New York City. One day, she activates a portal and a red Tyrannosaurus steps out of it. With the support of her friend Casey, she becomes a superhero named Moon Girl and names the dinosaur Devil Dinosaur.

In the second and final season, Lunella and Devil are in their prime element as the super heroes, Moon Girl and Devil Dinosaur. However, as Lunella's superhero life intertwines more with her personal life, especially after a multiversal encounter with a powerful alien villian named Molecule Man, she must decide if the cost of keeping her identity a secret is worth the toll it's taking on her family.

Chibi Tiny Tales is a series of shorts that depict characters from various Disney Channel properties in chibi-style animation. In June 2023, the series began releasing shorts based around Moon Girl and Devil Dinosaur.

A musical series which showcases Moon Girl using scientific concepts to take down bad guys.

During discussions with Marvel Studios regarding a potential collaboration with Cinema Gypsy Productions for a Marvel Cinematic Universe (MCU) project, president Louis D'Esposito showed actor and comic book fan Laurence Fishburne the comic book series Moon Girl And Devil Dinosaur. Having read the original Moon-Boy and Devil Dinosaur comic book as a child, Moon Girl piqued Fishburne's interest. He afterwards began reading the comics, which gave him the inspiration to create an animated series adaptation based on the duo. Fishburne and a production team worked on the series for two years at Disney Television Animation, before hiring Steve Loter as executive-producer due to his experience on female-centered shows such as Disney's Kim Possible. Loter and the team then created a roller-skating sequence played over "Sweatpants" by Childish Gambino as a proof-of-concept piece and pitched it to both executives at Disney Television Animation and a Marvel Studios team including Brad Winderbaum and president Kevin Feige, who greenlit the series for development.