Moira managed to survive her battle and was later declared cancer-free, though Mac sadly lost his fight in January 2024.

In the wake of his son’s passing, Sinise said via a statement on the Gary Sinise Foundation website: “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… I am so blessed, fortunate, and proud to be his dad.”

In a new interview with People Magazine, Sinise revealed his son had suffered from a type of bone cancer named chordoma. It’s so rare it’s said to only affect 300 people in the US each year.