Waylon Jennings was a prominent figure in American country music, known for his growling baritone voice and "outlaw" image that challenged Nashville's polished country/pop sound in the 70s. He was part of the Outlaw Country movement alongside Willie Nelson, with whom he recorded several albums, including the hit "Mammas Don't Let Your Babies Grow Up to Be Cowboys." His distinct blend of rock and country, often characterized by introspective lyrics and minimalist production, significantly influenced the evolution of country music. Jennings' significant works include "Honky Tonk Heroes," "Dreaming My Dreams," and "Are You Ready for the Country."