The duo, who announced their split in June 2015 after 10 years of marriage, were spotted at the 68th Annual Fourth of July Parade, reported People magazine.
It has been reported earlier that Garner was open to reuniting with the "Gone Girl" star but onlookers, at the parade, insist there were no signs the former couple have reconciled.
"(Ben) and (Jennifer) were sitting together watching the parade. They were not being affectionate. Ben and Violet were holding hands, and Ben was smiling watching the parade and walking around the community," a source said.