You didn't have to be Catholic to be in this scene, but that's real-life St. Patrick's pastor Father Nial McCabe at the door greeting the departing churchgoers. At the right in the doorway are stars Ella Raines and Brian Donlevy. At this time, the only Larkspur residents I can identify are, at the lower left, Hil Probert and his daughter Peggy.
If you can identify anyone else, please email me by clicking here.