Justin Guarini (born Justin Eldrin Bell on October 28, 1978 in Columbus, Georgia) is an American singer/songwriter, actor who rose to fame in 2002, as the first runner-up on the debut season of the television show American Idol.

His father, Eldrin Bell, is a former Atlanta Chief of Police. His mother, Kathy Pepino Guarini, was a journalist for WTVM TV in Columbus, and later for CNN. Guarini was raised by his mother and stepfather Jerry Guarini in Doylestown, Pennsylvania.