John Petrucci (born July 12, 1967) is a virtuoso guitarist best known as a founding member of the progressive metal group Dream Theater.
He is a virtuoso in the progressive metal genre and utilizes a mixture of styles when playing. He is also well known for his excellent alternate picking technique and versatility.
John first played guitar at age 8 when he noticed his sister (who was taking organ lessons at the time) was allowed to stay up past her bed time to practice. He soon dropped it when his plan failed. At age 12, he began playing again when he was invited into the band of his friend Kevin Moore, who would later become the first keyboardist of Dream Theater. John began to practice in earnest whilst exercising physically. He was a largely self-taught guitarist who developed his skills through attempts to match the skill of his idols, who included Steve Morse, Steve Howe, Steve Vai, Stevie Ray Vaughan, Al Di Meola, Alex Lifeson and Allan Holdsworth. He has jokingly referred to his guitar idols as "the Steves and the Als".