Robert John "Mutt" Lange is a renowned music producer and songwriter, best known for his work in the rock and country genres. He gained fame for producing hit albums for bands like Def Leppard and AC/DC, contributing to their commercial success with his innovative production techniques. Born on November 11, 1948, in Zambia, Lange has collaborated with various artists, including Shania Twain, with whom he was also married for several years. His ability to blend catchy melodies with powerful instrumentation has made him a significant figure in the music industry.