His newborn son underwent emergency heart surgery at just three days old.
As Kimmel explained, on April 21, his wife Molly McNearney gave birth to a boy, William.
Jimmy Kimmel was off last week, and on Monday night’s show he explained why with very personal, very heartfelt story about something his family is going through.
“Even that son of a bitch Matt Damon sent flowers,” Kimmel said.