In 1986, Marsden got his first professional acting job as the character
A. J. Quartermaine in the television series
General Hospital. In 1987, at the age of 12, Marsden booked his first major film role in the science fiction film
Robot Jox, which was released two years after filming because of the studio's financial problems. This was followed soon afterwards by the role of
Eddie Munster in the TV series remake of
The Munsters titled
The Munsters Today. At the same time, Marsden voiced Cavin in
Adventures of the Gummi Bears and became the announcer of
The Mickey Mouse Club. Marsden continued his career with many guest star appearances on prime time sitcoms. In 1990, he was the voice of
Peter Pan in
Peter Pan and the Pirates, which ran for two seasons and in 1992, he landed the role of Dash X in
Eerie, Indiana. He provided the voice of Thackery Binx's cat and human form in
Hocus Pocus (1993), and reprised the role in the
Hocus Pocus Villain Spelltacular. His next roles included voicing
Goofy's son
Max Goof in
Disney's
A Goofy Movie (1995), as well as in the sequel
An Extremely Goofy Movie (2000) and also had a supporting role in
White Squall (1996). Marsden also did the voice of Garrett Miller on
Extreme Ghostbusters and the younger versions of
Shere Khan and
King Louie on
Jungle Cubs, which was a prequel to Disney's hit film
Jungle Book and also continued his role as Max Goof on ''
Disney's House of Mouse''. Some other on-camera roles were that of Rich Halke (J.T's best friend) in
Step by Step, which was from 1995 until the show's cancellation in 1998; and Nelson Burkhard (D.J.'s rich boyfriend) in
Full House, though after making a commitment with
Dragon Con, Marsden did not reprise his role as Nelson in the sequel
Fuller House, with
Hal Sparks taking on the role. On
Boy Meets World, Marsden played a character named after himself. The role was created for Marsden by series creator/producer
Michael Jacobs, whom Marsden had worked with previously on
Almost Home. Marsden left
Boy Meets World after finishing the second season, with his character being replaced with Jack Hunter (
Matthew Lawrence) in Seasons 5–7. He played the young
Burt Ward/Robin in the 2003 television movie
Return to the Batcave: The Misadventures of Adam and Burt. In 1999, he was featured in
Walt Disney Animation Studios'
Tarzan as a member of the
gorilla family, a role given by the film's director,
Kevin Lima, who also helmed
A Goofy Movie. Since
Step by Step, Marsden has provided voices for numerous animated television shows and computer games. He did the voice of
Kovu in ''
The Lion King II: Simba's Pride (1998) and narrated many of the special features on the Lion King
Special edition DVD. He was the voice of Haku in the American dub of Spirited Away (2001). He has also provided the voice of Richie Foley/Gear in the television series Static Shock. In Baldur's Gate II: Shadows of Amn, he voiced several characters, most notably Lilarcor the talking sword, and the druid Cernd. His first foray into directing was an episode of the Nickelodeon series The Journey of Allen Strange (1997). He also directed, wrote, produced and edited The Greatest Short Film Ever!!!'' and multiple indie music videos. He has done voice-over work on multiple
DC Comics-inspired animated series; as
Clark Kent as a teenager in
Superman: The Animated Series, as
Snapper Carr in
Justice League, as
Billy Numerous in
Teen Titans, as Donny Grasso on an episode of
Batman Beyond, as Danger Duck in
Loonatics Unleashed and as the villain
Firefly in
The Batman and as
Paco in
Batman: The Brave and the Bold. Marsden also voiced Chase Young in
Xiaolin Showdown from 2003 to 2006, and from 2003 to 2004, voiced Todd Sweeney in the Christmas episode of
My Life as a Teenage Robot. He also voiced for Tak in the game
Tak and the Power of Juju along with
Tak 2: The Staff of Dreams and
Tak: The Great Juju Challenge. He voiced two recruitable companion characters in the
Fallout game series, Myron in
Fallout 2 (1998) and Boone in
Fallout: New Vegas (2010). From late summer 2004 to early spring 2007, Marsden was the head announcer for
Toon Disney (excluding
Jetix), but he also served as a part-time announcer for
Disney Channel. He had a
cameo in the film
Fun with Dick and Jane as the cashier at the gas station, and voiced
Tasslehoff Burrfoot in
Dragonlance: Dragons of Autumn Twilight. In 2012, Marsden did the voice of
Final Fantasy XIII-2 character
Noel Kreiss, Kade Burns and Fingers on
The Hub series
Transformers: Rescue Bots and
Kaijudo. In
Young Justice, Marsden voiced
Bart Allen,
Barry Allen's future grandson. Following the cancellation of
Young Justice, Marsden returned in 2019 to voice Bart in the series' third season,
Young Justice: Outsiders. In 2013, he did the voice of Aye-Aye in
The Legend of Korra. Richmond in 2022 In 2014, he voiced Sumo and Belson in the pilot episode of the
Cartoon Network animated series
Clarence. After this episode, the voices of Sumo and Belson were handed to
Tom Kenny and
Roger Craig Smith, respectively. In 2020, Marsden began producing an online web series for YouTube called The Mars Variety Show. Following the style of
The Dean Martin Show, it features Indie musicians, comedians, and alternative performers. == Personal life ==