Incredible news from late night talk show host Jimmy Kimmel: His newborn son Billy is on the mend following open-heart surgery shortly after birth last week.

“Our son Billy is doing very well,” said the “Jimmy Kimmel Live” host, who took some time off from the show last week after making a stunning announcement that the baby was born on April 21 with a heart disease that required immediate attention.

“He’s eating. He’s getting bigger. He’s sleeping well. He can read now, which they say is unusual,” Kimmel quipped Monday night in his monologue. “My wife took a little video of him today. You can see — he’s smiling because so many people donated to Children’s Hospital Los Angeles. Either that or he has gas. We don’t know.”

Jimmy Kimmel with wife Molly McNearney, son Billy, and daughter Jane. Jimmy Kimmel Live / YouTube

The video can be seen in the clip from “Live,” above.

“What a humbling outpouring of support,” he continued. “So many people made donations to CHLA, and my wife and I are very grateful.”

In his May 2 monologue, Kimmel spoke from the heart about the emotional roller coaster his family had been on since Billy’s birth and subsequent surgery. Through tears, Kimmel also targeted America’s health care situation ahead of legislation that was working its way though Congress to repeal the Affordable Care Act.

Read more about Billy’s recovery on TODAY