Carlos Marttelo is a Mexican puppeteer and voice actor. He's been a Muppet performer on Plaza Sésamo, the Mexican co-production of Sesame Street, playing various Multimuppet and Multimonstruo roles in the 2005 and 2010 seasons, and dubbing occasional inserts. In 2011, he began playing Elmo on the series in the "plaza" segments, as well as taking over the dubbing of Elmo on the series and in resource videos.
He has also provided additional voices in such Spanish dubs as Lost, Legally Blondes, Hannah Montana: The Movie, and A Beautiful Mind. Cartoon dub credits, primarily for Disney, include Prep & Landing (as Lanny), Tinker Bell & the Lost Treasure (as Stone), and The Little Mermaid: Ariel's Beginning (as Swifty).