Donna Troy is a superhero appearing in American comic books published by DC Comics. She is the original Wonder Girl and later temporarily adopts another identity, Troia. Created by Bob Haney and Bruno Premiani, she first appeared in The Brave and the Bold #60. Donna has been commonly featured in stories involving the Teen Titans, which she originally joined during their second adventure and is since depicted as a founding member of the team.

Wonder Girl is the alias of multiple superheroines featured in comic books published by DC Comics. Donna Troy, the original Wonder Girl, was created by Bob Haney and Bruno Premiani and first appeared in The Brave and the Bold #60. The second Wonder Girl, Cassie Sandsmark, was created by John Byrne and first appeared in Wonder Woman #105. Both are protégées of Wonder Woman and members of different incarnations of the Teen Titans. The alias has also been used in reference to a younger version of Wonder Woman as a teenager. In the 2020s, DC introduced a third Wonder Girl in Yara Flor, who hails from a Brazilian tribe of Amazons and was shown in a flashforward to one day succeed Diana as Wonder Woman.