LOS ANGELES — Jennifer Garner and Ben Affleck filed divorce petitions Thursday, the first step in formally ending their marriage more than a year after they publicly declared their relationship was over.

The actors both filed divorce petitions in Los Angeles County Superior Court, citing irreconcilable differences and seeking joint custody of their three children, who range in age from 5 to 11.

The filings were made without attorneys and are virtually identical. Neither lists a date of separation.

The couple announced in June 2015 they were separating after 10 years of marriage.

“We go forward with love and friendship for one another and a commitment to co-parenting our children,” Garner and Affleck said in a joint statement at the time.

“This will be our only comment on this private, family matter.”

The actors met while making 2003’s “Daredevil,” in which they both played superheroes.

Affleck, a two-time Oscar winner, announced last month that he had recently completed treatment for alcohol addiction.

His breakup from Garner returned him to the tabloids, where he had been a mainstay years earlier because of his relationship with singer Jennifer Lopez.

– From news service reports