Peter Charles Marquardt (July 1, 1964 – July 19, 2014) was an American actor and video game producer.He was best known for his debut film role as the drug lord Moco (Spanish for "booger") in Robert Rodriguez's 1992 action film El Mariachi. He landed the role following a chance encounter with Rodriguez at a research facility, where both men were volunteering as test subjects for cholesterol-lowering medication. Rodriguez cast Marquardt in the Spanish-language El Mariachi despite the fact that Marquardt did not speak Spanish.Marquardt reprised the role of Moco for a flashback sequence in Rodriguez's next film, Desperado. He later appeared in Rodriguez's Spy Kids 3-D: Game Over and starred in the 2011 horror-thriller The Shadow People.
Outside of film acting, Marquardt was an associate producer on several video games for Ion Storm, including Deus Ex and Wing Commander IV: The Price of Freedom. He also co-produced Dominion: Storm Over Gift 3.Marquardt died in Austin, Texas on July 19, 2014. He was 50.