Paul Anthony Thomas was born October 5, 1980. His first instrument was guitar, but he later switched to bass. Thomas grew up with his friends Benji and Joel Madden and the three attended high school together in La Plata, Maryland. Before graduation, the three along with Billy Martin formed the band Good Charlotte. On the fifth of October 2010, his daughter was born; Willow Monroe Thomas. He also appeared with his band mates in the 2001 film Not Another Teen Movie and the television special iCarlyiGo to Japan.
In 2010, his wife gave birth. In 2012, his wife gave birth again, and he was forced to miss a couple of Good Charlotte shows for the first time ever; Serge Dmitrijevic from the Madden Brothers and Sugar Ray temporarily filled-in for him.