Mark Stuart Spiro is an American songwriter, musician, and record producer. He has collaborated on songs with numerous American rock bands such as REO Speedwagon, Mr. Big, Heart, Cheap Trick, Kansas, Winger, Giant, Bad English, John Waite and Julian Lennon. Spiro was born and raised in Seattle, Washington. In his early career, he spent time in Germany working with Jack White and other producers, and he released his first solo album, In Stereo. Spiro moved to Los Angeles where he worked as a songwriter, and collaborated with a number of artists.