Elsa Keslassy International Correspondent“The Reunion,” the French Riviera-set series adapted from Guillaume Musso’s bestselling novel “La Jeune Fille et la Nuit,” has started shooting on location in the south of France with an international cast headlined by Ioan Gruffudd (“Fantastic Four”), Ivanna Sakhno (“Pacific Rim Uprising”) and Grégory Fitoussi (“Spiral”).Directed by Bill Eagles (“Beautiful Creatures,” “12 Monkeys”), the English-language series is produced by Sydney Gallonde at Make It