Mike Mills is an American musician, best known as the bassist and co-founder of the alternative rock band R.E.M.. Formed in 1980, R.E.M. became one of the most influential bands in the music industry, known for their unique sound and poetic lyrics. Mills contributed to the band's success with his melodic bass lines and harmonies. In addition to his work with R.E.M., Mike Mills has pursued various solo projects and collaborations with other artists. He has also composed music for films and participated in various charitable efforts, showcasing his commitment to both music and community engagement.