Late-night host Jimmy Kimmel revealed on Monday’s broadcast that his newborn baby son had to undergo open heart surgery.

The comedian got emotional as he described how he and his wife, writer Molly McNearney, were faced with the terrifying ordeal of learning their son William “Billy” Kimmel was born with a heart disease.

“It’s a terrifying thing,” Kimmel explained on “Jimmy Kimmel Live.”

The baby was taken to Children’s Hospital where he received cardiac surgery.

“The operation was a success,” Kimmel said. “It was the longest three hours of my life — but it was a success.”

Kimmel thanked all the hospital staff by name and urged his viewers to support their efforts.

He also managed to crack a few jokes about the newborn after showing an image of the beaming baby.

“Poor kid. Not only did he get a bad heart, he got my face,” Kimmel said.