James Leary’s television credits include a two-year stint as Clem, the loose-skinned demon on the critically acclaimed hit Buffy the Vampire Slayer starring Sarah Michelle Gellar. James turned the original five-line part at the beginning of season six into a regular recurring role and was soon a fan favorite.

He also had roles in HBO’s The Comeback, with Lisa Kudrow, and NBC’s Passions.

He was also the Mustachioed Madman making rash decisions in the "I Feel Great" Nutrigrain commercial which hit a cultural nerve in the pre-YouTube internet days, logging over 22 million views.
James co-wrote, co-produced and co-starred in the award-winning short film "Stunt C*cks", a light-hearted spoof of the adult entertainment industry, with co-stars Lou Diamond Phillips, Scott Thompson, and Ron Jeremy. The film played to sold-out crowds at film festivals around the country and won the audience award for best short film at the Deep Ellum film festival.

His other credits include a starring role in the award-winning, critically acclaimed sitcom Los Beltrán. In its two-year run, Los Beltran broke new ground as the first original comedy produced for Spanish language television in the United States. James brought his own undeniable energy and unique comic flair (he didn’t speak a word of Spanish) to the show as Kevin, the Beltrán family’s very American, flamboyant neighbor who rents an apartment from them with his same-sex partner Fernandito. The show received two GLAAD Media Award nominations (2000 and 2001) for Outstanding Comedy Series.

He also provides the voice for the characters El Toro, The Frogfather, Duck Holiday, and many others for both Pirate101 and Wizard101.