Jennifer Garner: My kids are lucky to have Ben Affleck as a dad

Jennifer Garner says her children are "lucky" to have her ex-husband Ben Affleck as a father.

The 46-year-old actress has Violet, 12, Seraphina, nine, and Samuel, six, with the 'Argo' actor, and has heaped praise on the 45-year-old actor for being a loving parent to their brood.

Alongside a photograph of the 'Justice League' star, Jennifer wrote on Instagram for Father's Day (17.06.18): "Our kids are lucky to have a dad who looks at them the way you look at them and loves them the way you love them, @benaffleck. #happyfathersday #threeluckykids #haveagreatday [sic]"

In April, a source said the former couple are in a good place a year on from their divorce.

The Hollywood stars filed legal documents to end their marriage in April 2017, after having first split in 2015, and 12 months into their proceedings sources said they are continuing to happily co-parent.

The insider said: "Things are pretty good between them right now. They are happy to be together with their kids."

It was also claimed that Ben managed to find a "good routine" in seeing his children during breaks in his hectic filming schedule.

The source added: "He's found a really good routine. He's in a great place, enjoying his work on the new film and being able to fly back to spend time with the family during downtime."

Since their split, Ben has found love once again with 'Saturday Night Live' producer Lindsay Shookus, with whom he has a "very caring" relationship.

A source said: "They have a very caring relationship. They continue to get to know each other and they make a point to enjoy every moment. She works hard to visit when possible."

And Jennifer is believed to be incredibly supportive of the new romance.

The insider claimed: "As long as Ben keeps working on himself, Jen is happy. She will continue to support him because it benefits the kids."

And the 'Batman v. Superman: Dawn of Justice' star introduced his new flame to Jennifer late last year.

A source at the time said: "Ben and Lindsay looked so happy to finally be making their relationship legit with Jen. They've had to tiptoe around and Jen has resisted having the kids hang out with Lindsay. Ben was dressed up and seemed to really want to make a good impression on Jen - like how clean and healthy he looks. Lindsay looked a little nervous but was getting support from Ben."