Born in Baltimore, he was the son of Patricia Ragusa Harrison, an actress, and Michael Harrison, artistic director of the Baltimore Opera Company.
He was diagnosed with acute lymphocytic leukemia at the age of 18 months. Family members said he was treated at Hopkins for three years and remained in remission for another decade. He relapsed in January 2008 and was able to attend school until last fall. At the time he left school, he was cast in the role of Nathan Detroit in Guys and Dolls.
"He wanted to do that role so much," said his father.
His father said his son underwent chemotherapy for four months. "Throughout his therapy, which was painful at times, he maintained courage and grace that the doctors and nurses thought extraordinary," his father said. "He never complained and was always hopeful."
Mr. Harrison completed eighth grade at Friends School. He played saxophone with school band and was also on the school's wrestling team. He joined Boy Scout Troop 1000 at the Cathedral of Mary Our Queen and attained his Life Badge.
For 10 years, he attended Camp Sunrise, a cancer survivors' camp. He was an accomplished skier and played tennis and soccer. He was a member of a Roland Park Little League team.
His parents were divorced, but the teen held memberships in their religious congregations, where services will be held today.
A requiem Mass will be held at 10:30 a.m. today at Old St. Paul's Episcopal Church, Charles and Saratoga streets, where he was an acolyte and crucifer.
A funeral Mass will be offered at 1:30 p.m. today at the Roman Catholic Cathedral of Mary Our Queen, 5300 N. Charles St., where he was an altar server.
In addition to his parents, survivors include two aunts, Beatrice Robin of Lafitte, La., and Elaine Musso of Thibodaux, La.