Ben Affleck is officially 45 years old...
And he celebrated the sweet occasion with the most important people in his life, his children.
On Tuesday, August 15, Ben enjoyed a lovely dinner with Violet, 11, Seraphina, eight, and Samuel, five, whom he shares with estranged wife Jennifer Garner, at Barton G restaurant in West Hollywood.
The Affleck clan looked to be having a blast.
The dad-of-three was spotted donning his classic T-shirt, gray blazer, jeans and sneakers combo.
One onlooker noted to Us Weekly, “He was having fun spending quality time with [the kids]."
According to fellow restaurant-goers, the gang indulged in "fun dishes such as Studio 54 — The Disco Ball Pasta dish with meatballs, Lobster Pop Tarts and a Marie Antoinette’s Head dessert topped with three feet of cotton candy."
Even ex-wife, Jen Garner, played her part for the Oscar winner's big day.
The 45-year-old was spotted buying her former flame a birthday cake at the Brentwood Country Mart.
Jen and Ben called it quits in June 2015.
Despite no longer being a couple, the pair have always put their kids first, and are regularly enjoying family days out and vacations.
A friend of the Afflecks explained, “That is all part of Ben and Jen working together as coparents.”
“He’s trying to live a normal life and is focused on putting his family first.”
Meanwhile, the birthday boy is currently dating TV producer Lindsay Shookus.
Last month, Woman's Day exclusively revealed that their pair decided to go public because Lindsay, 37, is expecting.