Father's Day is on June 18, and a number of celebrity dads will be celebrating the holiday for the very first time! Starting with Hollywood's most beloved movie star, George Clooney, who is finally a father! George Clooney and wife Amal Clooney announced the birth of their twins, Alexander and Ella, in early June 2017.
RELATED: Sally Field's life in pictures
RELATED: Celebrity babies of 2017
"The Promise" actor Oscar Isaac is a new father to a baby boy with longtime girlfriend Elvira Lind. Their son arrived this spring.
Jesse Eisenberg is a new dad! The actor and his longtime girlfriend, Anna Strout, had a baby boy in early 2017.
The sole male Kardashian sibling welcomed a daughter with on-again, off-again fiancée Blac Chyna in November 2016. Rob will be celebrating his first Father's Day with daughter Dream Kardashian on June 18.
One Direction singer Liam Payne is a first-time father! He and girlfriend Cheryl Cole welcomed their first child, a son named Bear, in March.
"Moonlight" star Mahershala Ali is officially a father! The Oscar winner and wife Amatus Sami-Karim welcomed their first child together in February: a daughter named Bari Najma.
David Cross will be celebrating his first Father's Day! His wife, actress Amber Tamblyn, announced the birth of their daughter, Marlow, in February 2017.
HGTV host Carter Oosterhouse is a first-time father too. He and his wife, actress Amy Smart, welcomed daughter Flora in December 2016.
Another new daddy! Country music singer Shay Mooney of Dan + Shay and former Miss Arkansas Hannah Billingsley welcomed their first child, son Asher James, in January.
Chris Klein is a officially a father! Chris and his wife, Laina Rose Thyfault, welcomed a baby boy in July 2016. Not only will Chris be celebrating his first father's day, but his son will be 1 so soon!
Ryan Lochte and fiancé Kayla Rae Reid welcomed their first child, son Caiden Zane, in early June. Hopefully the new dad can get some rest before his first father's day!
"Little People, Big World" star Zach Roloff became a first-time dad in May when wife Tori gave birth to their son, Jackson Kyle. Like his famous father, Jackson was born with achondroplasia, the most common form of dwarfism.
Thomas Rhett is celebrating his first father's day, too! The country singer and wife Lauren announced in May that they'd adopted daughter Willa Gray Akins from Uganda. Making things twice as nice? Lauren is expecting the couple's first biological child in August.
"The Walking Dead" star Steven Yeun became a first-time father on St. Patrick's Day when wife Joana Pak gave birth to their baby boy.
Australian actor Guy Pearce and "Game of Thrones" star Carice van Houtem welcomed their first child, a son named Monte, in August 2016.
"Million Dollar Listing" star Josh Altman is a new dad! Josh and wife Heather Bilyeu welcomed a daughter named Alexis in April.