Relient K is an American rock band formed in 1998 in Mason, Ohio. Known for their catchy melodies and clever lyrics, they blend elements of pop punk and alternative rock. The band gained popularity in the early 2000s with albums like Mmhmm and Two Lefts Don't Make a Right...but Three Do, which featured themes of faith, relationships, and personal growth. Over the years, Relient K has undergone several lineup changes, with Matt Thiessen as the primary songwriter and lead vocalist. Their music often appeals to both Christian and mainstream audiences, showcasing a unique sound that combines humor and heartfelt messages.