Kimmel, 50, announced in May that Billy, now 7 months old, had been born with a heart defect that required emergency surgery. The baby's condition compelled the late night host to delve into the national healthcare debate, with Kimmel arguing passionately for coverage for those with preexisting conditions.

\"Before you post the nasty Facebook message saying I'm politicizing my son's health problems, I want you to know, I am politicizing my son's health problems because I have to,\" he said in September.

Billy is helping me write tonight's monologue. I'll give our thoughts on the #GrahamCassidy health \"care\" bill. #BillCassidy @LindseyGrahamSC

A post shared by Jimmy Kimmel (@jimmykimmel) on Sep 19, 2017 at 1:39pm PDT

Billy is three months old today and doing great. Thanks for all your love & support and please remind your Congresspeople that every kid deserves the care Billy got.

A post shared by Jimmy Kimmel (@jimmykimmel) on Jul 21, 2017 at 1:06pm PDT

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