Harris' singing voice landed him the role when Tobias Ragg around many concert performances of Sweeney Todd. He as well was in the 2000 film The Next Right Tool, in which he played David, a Rupert Everett character's boyfriend. He has manufactured the guest appearance in the episode "Girls, Interrupted" on the sitcom Will & Grace in which his character was a former homosexual trying to convert others to heterosexuality, but ended up being converted back to homosexuality by Jack (played by Sean Hayes). He likewise appeared around an episode of Law and Order: Criminal Intent in 2004, cast against type as a Jeffrey Dahmer-like serial killer.

Within 2002 he performed on Broadway beside Anne Heche in Proof. In 2003, he performed in Cabaret, alongside Deborah Gibson and Tom Bosley, where he played a role of the Master of ceremonies. Within 2004 he performed the dual role of the Crooner & Lee Harvey Oswald on Broadway in the controversial musical revival of Stephen Sondheim's Assassins. He also sang a role of Charles on the Ideal recording of Sondheim's Evening Primrose.

He as well played the parody of himself in the movie Harold & Kumar Go to White Castle in 2004.

Harris presently plays Barney in How I Met Your Mother.

When he has never publicly responded to questions on to his sexual orientation, he is widely believed to be gay. Preceding reports from either tabloid media have set him around relationships by having actors Max von Essen and David Burtka, although none of them own confirmed this. Besides, hearsay teem in the theater community that Harris' office relationship by owning Sondheim — world health organization is many decades his senior — led to the intimate 1.

Selected filmography
Television
Doogie Howser, M.D. title role Spider-Man: The New Animated Series as Peter Parker/Spider-Man Stark Raving Mad (TV Show) Henry Will & Grace guest appearance Celebrity Poker Showdown (31 Oct 2004) NUMB3RS (2005) How I Met Your Mother Barney (2005)

Cinema
Harold & Kumar Go to White Castle (2004) Undercover Brother (2002) Lance The Next Best Thing (2000) David Starship Troopers (1997)

Theater
Rent National Tour-LA, San Diego Mark Cohen Assassins (2004) Balladeer; Lee Harvey Oswald Cabaret (2003) Emcee Proof (2002) Sweeney Todd Tobias Ragg Tick, Tick... BOOM! Jon