The couple went through a very public divorce and she even staged an intervention that led to him going to rehab for drinking issues.
But they have passed through that and regularly go to church together as they come to terms with leading separate lives.
The famous pair attended their church in Brentwood, Los Angeles, on Sunday with their two daughters Violet, 13, and Seraphina, 9.
Both Ben and Jennifer seemed relaxed to be at church and to be in one another's company too.
They talked to their kids at to other churchgoers too as they enjoyed the warm weather after leaving the Sunday service.
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Garner, 46, looked chic a knee-length navy skirt and a striped white and blue top with blue high heels.
The brunette actress, who shares three children with her ex Ben Affleck, went for a minimal makeup look and wore her wavy hair down.
The couple married in 2005 and they split in 2015, but they waited until April 2017 to file for divorce, leading to rumors that they would reunite.
Affleck seemed in a relaxed mood as he dressed casual in a blue jacket, denim shirt and khaki pants.
The actor stopped at one point to tenderly kissed his daughter Seraphina on the head.
He endured a stint in rehab to confront his drinking issues at the end of 2018.
Garner has been linked with businessman John Miller in recent times.
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