Months after revealing his newborn son's diagnosis with a serious heart condition, Jimmy Kimmel says that little Billy is "doing great."

The Jimmy Kimmel Live host shared an extremely cute photo (that smile!) of the 3-month-old baby on Friday. He also encouraged fans to call their representatives and senators -- a particularly urgent request as Republicans continue to blather on about repealing the Affordable Care Act.

SEE ALSO:Jimmy Kimmel had a serious chat with some kids about the GOP health care bill

"Thx for the love & support," Kimmel tweeted. "Please remind your Congresspeople that every kid deserves the care he got."

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The update comes after Kimmel dedicated a Jimmy Kimmel Livemonologue to Billy in May, shortly after the child was diagnosed with Tetralogy of Fallot with pulmonary artesia and underwent open-heart surgery.

"In layman's terms," Kimmel said at the time, "the pulmonary valve was completely blocked."

He also called for Congress to prioritize care for people who have pre-existing conditions -- even if those patients don't have the financial means to pay for care themselves.

"If your baby is about to die, it shouldn't matter how much money you make," Kimmel said. "This isn't football. There are no teams. We are the team — it's the United States. Don't let their partisan squabbles divide us."

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TopicsJimmy Kimmel LiveTwitter