(CNN) "Catastrophe" star Rob Delaney is mourning the death of his two-year-old son, Henry, following the boy's battle with cancer, the actor announced Friday in a Facebook post.

"I have very sad news. My two and a half year year old son Henry has passed away," Delaney wrote.

According to the actor, who starred in the Amazon comedy series for three seasons, his son was diagnosed with a brain tumor in 2016, shortly after his first birthday. He received surgery and treatment through the early part of 2017, but the cancer returned late last year. Henry died in January.

"My wife and Henry's older brothers and I are devastated of course," he wrote. "Henry was a joy. He was smart, funny, and mischievous and we had so many wonderful adventures together, particularly after he'd moved home following fifteen months living in hospitals."

According to Delaney, the tumor and surgeries had left Henry with "significant physical disabilities," but he had learned how to communicate through sign language.

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