'Grateful' Jimmy Kimmel shares adorable pic for son Billy's 2nd birthday

Jimmy Kimmel and his family had something extra special to celebrate this weekend — his son Billy's second birthday.

The little one turned 2 on Easter Sunday, and his dad took to social media to not only wish his boy a happy birthday, but to also give thanks to the doctors and nurses who helped save Billy's life.

Alongside an adorable picture of Billy holding a carrot (very holiday-appropriate!), the host of "Jimmy Kimmel Live!" celebrated his son with the caption, "Happy 2nd birthday to our little #Easter buddy Billy."

He continued with words of gratitude for the hospital staff that cared for Billy, who was born with a congenital heart condition called tetralogy of Fallot with pulmonary atresia and underwent two surgeries — one at 3 days old, and one at 7 months.

"We are grateful always to the nurses and doctors at @CedarsSinai & @ChildrensLA who saved his life and all of you who prayed & sent positive thoughts our way," Kimmel wrote.

Billy's mom (and Kimmel's wife), Molly McNearney, also gave thanks for the medical staff.

In a sweet photo of Billy dressed up in a cute seersucker jacket, McNearney wrote, "Happy 2nd Birthday Billy. Thanks to all the nurses and doctors at @ChildrensLA who saved his life. Sending love and prayers to all the families in the hospital today and always."

Kimmel has been open about the challenges the couple has faced with the uncertainty of Billy's health.

"There were secrets we kept from each other that we revealed only after the second surgery," he said in an interview for the April 2018 issue of O, The Oprah Magazine. "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."

Kimmel had revealed to the public his son's heart defect in an emotional monologue on his late-night show less than two weeks after Billy's arrival. When Oprah Winfrey asked him if it was scary at first to get so personal while talking about his son, Kimmel said, "I don't know if it was scary, but it was uncomfortable, and it's not something I looked forward to. I definitely felt a sense of relief when it was over."

Over the weekend, Kimmel felt a sense of joy as Billy celebrated his special day. Hope you had a nice birthday, Billy!

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JIMMY KIMMEL LIVE! - 'Jimmy Kimmel Live!' airs every weeknight at 11:35 p.m. EDT and features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human interest subjects, along with comedy bits and a house band. The guests for Monday, April 16 included Rob Lowe ('Super Troopers 2'), Michelle Wolf (Host of this year's White House Correspondents Dinner), and musical guest Jorja Smith. (Randy Holmes/ABC via Getty Images) JIMMY KIMMEL
JIMMY KIMMEL LIVE! - 'Jimmy Kimmel Live!' airs every weeknight at 11:35 p.m. EDT and features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human interest subjects, along with comedy bits and a house band. The guests for Thursday, April 12 included Shia LaBeouf ('Borg Vs. McEnroe'), Sandra Oh ('Killing Eve'), and musical guest First Aid Kit. (Randy Holmes/ABC via Getty Images) JIMMY KIMMEL, CLETO AND THE CLETONES
JIMMY KIMMEL LIVE! - 'Jimmy Kimmel Live!' airs every weeknight at 11:35 p.m. EDT and features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human interest subjects, along with comedy bits and a house band. The guests for Wednesday, April 11 included Anna Faris ('Overboard'), Chris Hardwick ('Talking Dead'), and musical guest The Regrettes. (Randy Holmes/ABC via Getty Images) JIMMY KIMMEL, CLETO AND THE CLETONES
JIMMY KIMMEL LIVE! - 'Jimmy Kimmel Live!' airs every weeknight at 11:35 p.m. EDT and features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human interest subjects, along with comedy bits and a house band. The guests for Wednesday, April 11 included Anna Faris ('Overboard'), Chris Hardwick ('Talking Dead'), and musical guest The Regrettes. (Randy Holmes/ABC via Getty Images) JIMMY KIMMEL
JIMMY KIMMEL LIVE! - 'Jimmy Kimmel Live!' airs every weeknight at 11:35 p.m. EDT and features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human interest subjects, along with comedy bits and a house band. The guests for Tuesday, April 10 included Eva Longoria ('Overboard'), Sebastian Maniscalco (Radio City Music Hall Special), and musical guest Daniel Caesar Ft. H.E.R. (Randy Holmes/ABC via Getty Images) JIMMY KIMMEL
JIMMY KIMMEL LIVE! - 'Jimmy Kimmel Live!' airs every weeknight at 11:35 p.m. EDT and features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human interest subjects, along with comedy bits and a house band. The guests for Monday, April 9 included Zooey Deschanel ('New Girl'), Snoop Dogg ('Joker's Wild'), and musical guest Snoop Dogg. (Randy Holmes via Getty Images) SNOOP DOGG, JIMMY KIMMEL
JIMMY KIMMEL LIVE! - 'Jimmy Kimmel Live!' airs every weeknight at 11:35 p.m. EDT and features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human interest subjects, along with comedy bits and a house band. The guests for Monday, April 9 included Zooey Deschanel ('New Girl'), Snoop Dogg ('Joker's Wild'), and musical guest Snoop Dogg. (Randy Holmes via Getty Images) JIMMY KIMMEL
LOS ANGELES, CA - APRIL 09: Jimmy Kimmel is seen at 'Jimmy Kimmel Live' on April 09, 2018 in Los Angeles, California. (Photo by RB/Bauer-Griffin/GC Images)
JIMMY KIMMEL LIVE! - 'Jimmy Kimmel Live!' airs every weeknight at 11:35 p.m. EDT and features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human interest subjects, along with comedy bits and a house band. The guests for Monday, April 2 included Jeffrey Dean Morgan ('Rampage'), Jenna Fischer ('Splitting Up Together'), and musical guest Ashley McBryde. (Randy Holmes/ABC via Getty Images) GUILLERMO RODRIGUEZ, VAISHNAVI SAM, JIMMY KIMMEL, SAMUEL BERNARDO, AMIMRA WARREN
JIMMY KIMMEL LIVE! - 'Jimmy Kimmel Live!' airs every weeknight at 11:35 p.m. EDT and features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human interest subjects, along with comedy bits and a house band. The guests for Wednesday, March 21 included Charlie Day ('Pacific Rim Uprising'), Henry Winkler ('Barry'), and musical guest Sabrina Carpenter Ft. Jonas Blue. (Randy Holmes/ABC via Getty Images) HENRY WINKLER, JIMMY KIMMEL
JIMMY KIMMEL LIVE! - 'Jimmy Kimmel Live!' airs every weeknight at 11:35 p.m. EDT and features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human interest subjects, along with comedy bits and a house band. The guests for Tuesday, March 20 included Katie Couric ('Stand Up To Cancer'), Judd Apatow ('The Zen Diaries of Garry Shandling'), and musical guest The Decemberists. (Randy Holmes/ABC via Getty Images) JIMMY KIMMEL
JIMMY KIMMEL LIVE! - 'Jimmy Kimmel Live!' airs every weeknight at 11:35 p.m. EDT and features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human interest subjects, along with comedy bits and a house band. The guests for Thursday, March 15 included Zach Braff ('Alex, Inc.'), Nick Robinson ('Love, Simon'), and musical guest B�rns. (Randy Holmes/ABC via Getty Images) JIMMY KIMMEL
JIMMY KIMMEL LIVE! - 'Jimmy Kimmel Live!' airs every weeknight at 11:35 p.m. EDT and features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human interest subjects, along with comedy bits and a house band. The guests for Tuesday, March 13 included Andy Samberg ('Brooklyn Nine-Nine'), Lena Waithe ('Ready Player One'), and musical guest Buddy Guy. (Randy Holmes/ABC via Getty Images) JIMMY KIMMEL
JIMMY KIMMEL LIVE! - 'Jimmy Kimmel Live!' airs every weeknight at 11:35 p.m. EDT and features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human interest subjects, along with comedy bits and a house band. The guests for Monday, March 12 included Lionel Richie ('American Idol), Yara Shahidi ('grown-ish), and musical guest Moon Taxi. (Randy Holmes via Getty Images) JIMMY KIMMEL
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