Leathermouth.He was born October 31, 1981 in Belleville, New Jersey and attended Queen of Peace High School in North Arlington. He went to Rutgers University on a scholarship, but dropped out. Iero's parents split when he was young and he grew up living with his mother, who lent out her basement to her son's many band practices; his father was a musician and a big influence on young Iero wanting to learn an instrument. He first tried drums, later picked up the guitar instead, and began playing in bands at age 11. When Iero was younger he suffered from Epstein-Barr virus, ear infections & bronchitis. He suffered numerous lacerations to his head, hands, and knees.
Before joining My Chemical Romance he participated in several bands, including I Am A Graveyard, Pencey Prep, Hybrid, Sector 12, and Give Up the Ghost. Iero is the frontman of hardcore punk quintet Leathermouth, who released their debut album XO in January 2009, on Epitaph Records. He is involved in a tribute band to The Cure named The Love Cats, after the song of the same name, and recently played bass with Reggie And The Full Effect on their farewell tour. Iero is the co-founder of record company and clothing label Skeleton Crew.
Iero was a judge for the 7th annual Independent Music Awards to support independent artists.
On March 17, 2010, Iero announced in the My Chemical Romance official website that he and his wife, Jamia will be having twins. The children are expected to be born in late summer, 2010. On July 27, 2010, Frank replied to band mate Ray Toro's twitter saying, "...this is what i imagine my daughters will look like right b4 i wake up in a cold sweat," confirming that he and his wife are expecting twin girls
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