Mary Bridget Kelleher, 56 of Claymont passed away peacefully at Christiana Hospital on Tuesday, September 14, 2021. Mary was born in Wilmington, the daughter of the late Marie (Flaherty) and John A. Kelleher, Jr. She graduated from Wilmington High School and was attending Purdue University to receive her Associates Degree in Criminal Justice. Mary excelled in school and was proud to consistently earn a place on the Dean's List. Mary was actively involved in autism awareness and support for the autistic community. When her health allowed it, Mary donated her time to Autism Delaware. She had a deep passion for the cause and was its true champion. Mary loved animals and, even after becoming wheelchair bound, donated her time to the Delaware Humane Society. She enjoyed spending time with all the animals but had a special love for the cats. This is where she met her cherished cat Beijing, whom she eventually adopted. Mary had a deep appreciation of music and the artists who performed it. Her eclectic taste included Freddie Mercury, Michael Jackson, Barry Manilow, Prince and Donny Osmond. One of Mary's favorite stories to recount was "The time that Donny Osmond kissed her on the cheek during a concert." Mary is survived by her son, Charles Betz of Wilmington; her sister and brother-in-law, Patricia and James Pawlikowski of Newark; her nephews, James, Jr., Stephen and his wife, Amanda and Nickolas and her great nephew, Noah. Funeral services will be held at a later date. In lieu of flowers, the family suggests contributions to Autism, DE, 928 Old Harmony Rd, Newark, DE 19713. Online condolences may be sent to Mealeyfuneralhomes.com.