Nate Kinsella is an American multi-instrumentalist, composer, sound engineer, and producer. He performs solo as Birthmark and in a number of other projects, many with one or both of his cousins, Mike and Tim Kinsella. These include former bands Joan of Arc and Make Believe as well as ongoing projects American Football and Lies.

Mike Kinsella is an American musician and singer-songwriter. Having been involved in many Illinois-based bands, he is best known as the lead vocalist and guitarist of the emo band American Football.