Harris married actor
Gary Sinise in 1981. She was diagnosed with
breast cancer in 2018 and as of 2024 she is cancer-free. They had three children, Mac, Sophie and Ella. Her son, McCanna "Mac" Anthony Sinise (born on November 10, 1990), died on January 5, 2024 and was laid to rest on January 23, 2024 in a Catholic service. He had been diagnosed in 2018 with
chordoma, a rare cancer of the spine. Mac was a musician who had worked for his father's charitable foundation, and before his death, he had completed work on an album
Resurrection & Revival. Moira is a practicing
Catholic; she converted to the faith in 2000. ==References==