Louis Andrew Grammatico (born May 2, 1950), known professionally as Lou Gramm, is an American singer and songwriter. He is best known as co-founder and original frontman of the rock band Foreigner from 1976 to 1990 and again from 1992 to 2003, during which time the band had numerous successful albums and singles.
Gramm is considered among the greatest and most successful rock vocalists of his generation. He co-wrote most of Foreigner's hits with bandmate Mick Jones. Together, they are inducted into the Songwriters Hall of Fame class of 2013. In 2024, Gramm was inducted into the Rock and Roll Hall of Fame as a member of Foreigner.
