Ben Affleck spends quality time with his and Jennifer Garner's kids for his 45th birthday

Ben Affleck’s 45th birthday was a family affair! The Justice League actor was joined by his and ex-wife Jennifer Garner’s children — Violet, 11, Seraphina, eight, and Samuel, five — for his party at Los Angeles’ Barton G restaurant on Tuesday.

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benbdayVIEW GALLERY Ben Affleck celebrated his 45th birthday with his children on August 15 Photo: 2017 Backgrid/The Grosby Group

"Ben was seen having a great time with his kids at Barton G. They were seen joking and laughing," a source tells HOLA! USA. "Earlier this week they spent time as a family unit. This is something that Ben and Jen have put great effort into."

The celebration comes days after Ben and Jennifer reunited on August 13 for a family pizza date with their kids at Chris O'Donnell's new restaurant Pizzana in Brentwood. The dad-of-three, who is currently dating Saturday Night Live producer Lindsay Shookus, was dressed casual for his birthday on August 15 sporting blue jeans, a t-shirt and grey blazer.

jenbenbdayVIEW GALLERY Jennifer was pictured earlier in the day picking up a large box Photo: 2017 X17/The Grosby Group

The actor was spotted arriving to the restaurant solo, while his children arrived later with gifts on hand. The Oscar winner's ex-wife, Jennifer Garner, was all smiles earlier in the day picking up what appeared to be a large dessert box from Brentwood Country Mart. Gold and silver balloons were also seen being delivered to the filmmaker's Pacific Palisades house.

Ben and Jennifer, 45, split in 2015 after ten years of marriage and officially filed for divorce earlier this year. Despite parting ways, Ben and Jennifer have maintained an amicable relationship. In an interview with the Today Show last August, the mom-of-three admitted, “We are definitely a modern family. We’re doing really well.”

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