McCanna Anthony “Mac” Sinise, a multi-instrumental musician and the son of actor Gary Sinise, died of a rare cancer called chordoma on Jan. 5. He was 33.

Gary Sinise confirmed his son’s passing in a tribute posted to his foundation’s website, in which he detailed his years-long battle with the disease as well as his unfaltering commitment to making music, which included recording his album “Resurrection and Revival” in the final months of his life.

Gary Sinise wrote, “The week the album went to press, Mac lost his battle with cancer. He died on January 5, 2024 at 3:25pm, and was laid to rest on January 23rd. Like any family experiencing such a loss, we are heartbroken and have been managing as best we can. As parents, it is so difficult losing a child. My heart goes out to all who have suffered a similar loss, and to anyone who has lost a loved one.