Star vs. the Forces of Evil is an American animated magical girl television series created by Daron Nefcy and developed by Jordana Arkin and Dave Wasson, which aired on Disney Channel and Disney XD. It is the first Disney XD series created by a woman, and the third overall for Disney Television Animation (following Pepper Ann from 1997 and Doc McStuffins from 2012).

The series follows the adventures of Star Butterfly (voiced by Eden Sher), the young turbulent heir to the royal throne in the dimension of Mewni, who is sent to Earth to mellow her reckless behavior. There, she befriends and becomes roommates with human Marco Diaz (Adam McArthur) and begins a semi-normal life in Echo Creek, attending school and meeting new friends. Throughout the first season, the two travel to exotic dimensions using dimensional scissors while preventing the Mewman monster Ludo (Alan Tudyk), and later, Toffee (Michael C. Hall), from stealing Star's magic wand. As the series progresses, Star and Marco fall in love with each other, meet new friends, take on new enemies, and travel to even more weird and wild dimensions.

Star vs. the Forces of Evil typically follows a format of two 11-minute-long independent "segments" per episode for the first three seasons. The fourth season has a few more half-hour episodes than the first three. Greenlit for Disney Channel in 2013, the first episode of the series aired there as a preview on January 18, 2015. The series then moved to Disney XD on March 30, 2015, where its premiere on Disney XD became the most-watched animated series debut in the network's history. The fourth and final season premiered on March 10, 2019, with the series returning to Disney Channel. The series ended on May 19, 2019, with the episode "Cleaved".