"You will always be my superhero," Bindi Irwin captioned a photo of her with her late dad, Steve.
"Happy birthday and Father’s Day to my wonderful, loving, exceptional husband. What an amazing year you’ve had and I know this year will be filled with more fun, adventure and love," Katherine Schwarzenegger wrote about Chris Pratt ahead of the birth of their first child together.
Pratt is already dad to Jack, who he shares with ex-Anna Faris.
Justin Timberlake reflected on being a dad to Silas on Father's Day.
"Boys grow up to be fathers. I think about that a lot these days. We try to teach our son to love and to respect everyone," the singer wrote in a lengthy post.
"While we owe our sons and daughters these lessons in the places where the doors close at night, I hope you are as inspired as I am to make them THE TRUTH in the places that same door opens every morning and we send them out to discover. There’s more to do. And we are built for it."
Bruce Willis was celebrated by his wife Emma Heming Willis, his ex-wife Demi Moore and his older daughters for Father's Day.
"Happy Fathers Day Papa
I love you so much," Rumer wrote.
Alicia Keys shared four gorgeous black and white photos of her husband Swizz Beatz and his four kids on Father's Day.
Nick Carter went a different way on Father's Day and thanked his wife for making him a dad.
"Thank you GOD for giving my wife and I this beautiful family. And thank you for allowing me to be a father to these precious little souls. I love them so much," he wrote.
Seth Rogen shared a picture of his dad in an epic Grizzles jersey to mark the day.
He added, "Happy Fathers Day to my dad who will look for any excuse to wear shorts! (This is him at a charity event)."
Brian Austin Green
Brian Austin Green celebrated his own Father's Day with a rare pic of his kids.
"My heart ❤️ Happy Fathers Day everyone. My oldest text me at 12:21am this morning :)" he captioned the photo of the four of them.
Nicole Kidman shared a rare photo of her and Keith Urban's two daughters for Father's Day.
She added, "The recipient of the love of a truly great father, and the wife of a truly great father. Happy Fathers Day."
"Happy Father’s Day to this wonderful dad and to all the Fathers who are raising incredible, thoughtful, compassionate kids! I am celebrating you ALL," Reese Witherspoon captioned a picture of her husband, Tim Toth, and her youngest child, Tennessee.
"Happy Father’s Day Chris. We love you. I’m jealous that you make gene laugh so much harder than me. This picture is about a year old," Amy Schumer wrote beside a photo of husband, Chris Fischer, and son, Gene.
Amy Adams shared a throwback photo to mark Father's Day.
"Happy Father’s Day, Dad! Thank you for the music," she captioned it.
Jennifer Garner wrote a sweet message to her dad Billy Jack for Father's Day.
"Thank you, Billy Jack, for working your tail off, for hugging the world’s best hugs, and for mowing the lawn in the dark. #GirlDad—you scratched your head at the cost of pointe shoes, but have never missed a performance," she wrote.
However, it was the striking resemblance between father and daughter that fans couldn't get over.
Gwen Stefani thanked her partner Blake Shelton for helping her raise her kids.
"happy father’s day @blakeshelton thank u for helping me raise these boys!!" the singer wrote.
"Happy Father’s Day @davidbeckham! We all love u so so much xxxx So many kisses from us all x we love u!!!! X" Victoria Beckham wrote.
Khloe Kardashian wished all the dads in her life a Happy Father's Day including Tristan Thompson who she shares daughter True with.
Others to get shout outs included Robert Kardashian, Caitlyn Jenner, Travis Scott, Scott Disick, Kanye West and her brother Rob.
"Happy Fathers Day to the best dad!!!! Thank you for making life so much fun! You give our kids the most awesome life! I love you so much!!!" Kim Kardashian wrote as she celebrated Kanye West with pictures from their Wyoming ranch.
Jennifer Lopez celebrate Alex Rodriguez in a sweet video that she narrated.
She did the same for her own dad, too!
Jennifer Lopez wished her ex-Marc Anthony a happy Father's Day by sharing a collection of photos of him with their twins, Max and Emme.
"Happy Father’s Day flaco!! Wishing you the best day today," she wrote.
Prince William & Duchess Kate
Prince William shared a sweet photo of himself and his dad, Prince Charles, for Father's Day, alongside a throwback photo of Duchess Kate and her dad, Michael Middleton. The duchess is also the photographer of the photo of Charles and William.
Diane Kruger shared several photos of partner Norman Reedus and their daughter. "To the most handsome papa there is ♥️ Happy Father’s Day," the actress wrote in the caption.
Joel Madden shared a photo of wife Nicole Richie and their children, along with his father-in-law Lionel Richie.
Michelle Obama tweeted a photo of her husband and their daughters.
"Thank you for the way you love our girls — and all the young people in this country, no matter who they are or where they come from," wrote the former First Lady. "We feel your warmth and generosity today and everyday. Happy #FathersDay, Barack! ❤️"
Dua Lipa took to Twitter to share several photos of herself and her dad. "Happy Fathers Day to my BFF ❤️," she wrote in the caption.