Gary Sinise is receiving support from fellow stars following the death of his son, McCanna Anthony Sinise, who died from cancer on the age of 33.
The actor made the news public on Tuesday with a post on his Gary Sinise Foundation website, noting that Mac passed away Jan. 5 and was laid to rest Jan. 23.
“Like every family experiencing such a loss, we’re heartbroken and have been managing as best we will,” the 68-year-old wrote under a photograph of Mac, captioned: “In Honor & Memory McCanna Anthony ‘Mac’ Sinise, 1990-2024.”
“As parents, it’s so difficult losing a toddler. My heart goes out to all who’ve suffered an identical loss and to anyone who has lost a loved one,” he continued.
“We’ve all experienced it in a roundabout way.”
Several Hollywood celebrities posted messages of support for the “Forrest Gump” star and his family on Instagram.
“We’re so sorry Gary. You & your loved ones are deeply loved by so many,” wrote Angie Harmon. “We’re all praying for you. Love you so very much.”
Alyssa Milano, meanwhile, posted: “I’m so sorry, Gary. I’m praying in your family. And sending you like and strength.”
Actor Robert Patrick wrote, “Gary, all my deepest sympathy, sending love and prayers,” while singer Katharine McPhee offered, “Oh Gary. I’m so sorry.”
In his message on Tuesday, Gary — who’s also dad to daughters Sophia and Ella — wrote that Mac was diagnosed in 2018 with “a really rare cancer” called chordoma, just months after his wife, Moira Harris, was diagnosed with Stage 3 breast cancer (she’s in remission now).
He added that Mac’s cancer eventually spread and “disabled him increasingly as time went on.”
Singer Alec Benjamin, who knew Mac in college, also reached out to his family on Instagram.
“So sorry!!!” he wrote. “I went to [University of Southern California] with Mac. he was such a pleasant guy and so talented!”
Actress Kelly Carlson added that Gary “has been so strong through it and has managed to look after others as well.”
“Dan and I send our deepest condolences and love,” she said of her husband, Dan Stanchfield. “Gary you’re a remarkable man. For those who know him and even have just met him, know what I mean. Considered one of a form.”
“Wishing Mac an attractive journey and healing for his family. Just send out some love from your pals back West. We miss you.”
Gary shared on Tuesday that Mac’s battle lasted for greater than five years.
“It became increasingly difficult as time went on,” he wrote. “While our hearts ache at missing him, we’re comforted in knowing that Mac isn’t any longer struggling, and inspired and moved by how he managed it. He fought an uphill battle against a cancer that has no cure, but he never quit trying.”