The oldest of 10 children, Mike Miller, was born on December 3, 1942 in Clinton, Maryland in Southern Prince George's County. Educated in the Prince George's public school system, Mike received his Bachelor's Degree in Business Administration from the University of Maryland College Park in 1964, and went on to study law at the University of Maryland School of Law. Graduating in 1967, he was admitted to the Maryland State and Prince George's County Bar Associations that same year and has been in private practice for 40 years with offices in both Prince George's and Calvert Counties.