Danica McKellar is an American actress who has built a substantial career in voice acting alongside her on-screen performances. Born on January 3, 1975, in La Jolla, California, she is widely recognized for her live-action role as Winnie Cooper in the television series The Wonder Years. Her voice acting work spans animation and video games, often within the superhero and fantasy genres.

Her entry into voice acting includes roles in early 2000s animated series. She provided voices for characters in shows such as Static Shock, where she played Frieda Goren, and appeared in Justice League and The Fairly OddParents. A significant portion of her voice work has been for video games, where she has portrayed several Marvel Comics characters. These roles include Jubilee in X-Men Legends (2004) and the Invisible Woman in both Marvel: Ultimate Alliance (2006) and its sequel Marvel: Ultimate Alliance 2 (2009). She also lent her voice to the video game EverQuest II.

In the realm of anime-influenced video games, McKellar voiced the character Ophelia in the English adaptation of the Japanese action game Onimusha: Dawn of Dreams, released in 2006. This role stands as a notable credit within the specific genre of Japanese game localization.

McKellar is perhaps best known in animation for her long-standing role as Miss Martian (M'gann M'orzz) in the DC Comics animated series Young Justice. She first voiced the character in 2010 and continued the role across multiple seasons, including Young Justice: Invasion, Young Justice: Outsiders, and Young Justice: Phantoms, as well as the video game Young Justice: Legacy. This role represents a significant recurring collaboration within the DC animated universe. Her other DC-related voice work includes portraying Killer Frost in DC Super Hero Girls and Sally in the animated short DC Showcase: Superman/Shazam! The Return of Black Adam.

Her voice acting credits also extend to other franchises, including a role in Transformers: Rescue Bots and as the current voice of Judy Jetson for The Jetsons following the passing of the original actress. Beyond acting, McKellar is also an accomplished mathematician and author, having co-authored a scientific paper known as the Chayes–McKellar–Winn theorem and written several books aimed at making mathematics accessible to young students.