Adam Siegel (born March 9, 1969) is an American singer-songwriter, guitarist, bassist, producer, actor and graphic designer (he has provided artwork and design for several releases by L.A. groups) from Venice, California, United States. KISS, Black Sabbath, Sweet, Jimmy Page and The Sex Pistols are the musicians he cites as main influences.He is a founding member of the crossover thrash band Excel, and subsequently was the lead guitarist for the Suicidal Tendencies side project, Infectious Grooves and the group Eagle, who became The Blondes after receiving a cease and desist letter from Don Henley's legal counsel. He founded the power trio My Head with Excel former drummer Greg Saenz and played the bass in the indie rock band Eels.
Between 2005 and 2007, he lived and worked as engineer and producer in the Glassell Park neighborhood of Los Angeles. Currently, he is the Music Go Music guitarist and sporadically works as producer. He appeared in the movies Encino Man and Zelimo.