Reliable Source: Actress Julianna Margulies had birthday cake at Old Ebbitt

Hey isn't that ... "The Good Wife" herself, actress Julianna Margulies, having lunch at Old Ebbitt Grill with actor Griffin Dunne on Monday? Our tipster tells us the "ER" vet, who was dressed in a summer-friendly yellow blouse paired with gray slacks, ordered the wild Alaska salmon panzanella salad -- a very camera-friendly choice, no?