Jimmy Kimmel honored the physicians and nurses who helped save his son Billy’s life with a moving tribute on social media as he celebrated his son Billy’s 5th birthday.

The TV programme presenter shared a gorgeous photo of his little one on Instagram, along with a thank-you statement to everyone who aided the family during their trying time.

The 54-year-old wrote, “Happy 5th birthday to our little nut.”

“We are eternally grateful to the brilliant doctors and nurses at @ChildrensLA & @CedarsSinai for saving Billy’s life and to those of you whose donations, prayers and positive thoughts meant everything,” Kimmel added.

He asked his 2.5 million followers to help others who might need their support directing them to a link on his bio, adding, “Please support families who need medical care.”

Billy was born with a congenital heart defect called tetralogy of Fallot with pulmonary atresia, which required three surgeries.

Kimmel had previously told Oprah Winfrey that he and his wife were frightened of losing their son and avoided getting too close to him.

He had said in an interview for O, The Oprah Magazine, “There were secrets we kept from each other that we revealed only after the second surgery. The biggest one was that, I think subconsciously, we didn’t want to get too close to the baby because we didn’t know what was going to happen.”