James Denis Muller, of Sun City, Arizona, passed away surrounded by his family on October 12, 2019. James was born in Philadelphia, Pennsylvania in 1936, and retired to Surprise, Arizona in 1998. James was the devoted husband to Patricia for 63 years, loving father of Susan Spragins, Carolyn Muller, Pamela Muller, and Joyce Kern, and grandfather to Christine Spragins. James is survived by his beloved twin brother Charles D. Muller. Interment services will be private.