The `Total Recall` actor - who has children James, seven, with model Kim Bordenave and 23-month-old son Henry with actress Alicja Bechleda-Curus - does not see his eldest son`s genetic disorder Angelman`s Syndrome, which causes intellectual and developmental delay, and loves spending time with him when he can.
He said: "He`s doing phenomenal. Less and less and less do I see his condition. I`m just keenly aware of his personality. He`s really cool. He`s got an amazing team of people in his life.
"We have the seizures under control. He helps us in a way to be better people. He`s so much fun to be around. I just am crazy about him. His health is good."
The Irish hunk tries to stay in touch with both sons using internet service Skype, but neither boy is interested when he has attempted before.
He told USA Today: "James doesn`t really care. We tried this once, years ago. He didn`t care for it. Actually, Henry is kind of bored with it already."