(L to R) John Corbett as “Ian”, Maria Vacratsis as “Aunt Frieda”, Melina Kotselou as “Victory”, Nia Vardalos as “Toula”, Elena Kampouris as “Paris”, Andrea Martin as “Aunt Voula”, and Elias Kacavas as “Aristotle” in writer/director Nia Vardalos’ My Big Fat Greek Wedding 3, a Focus Features release. Courtesy of Yannis Drakoulidis / Focus Features

Did we need a My Big Fat Greek Wedding 3? Somebody thought so. Sure, the first one was charming, a word-of-mouth surprise hit romantic comedy, with both laughs and love in a big, close Greek-American family, when a young woman, Toula Portokalos (Nia Vardalos), upends family expectations by marrying a non-Greek man, Ian Miller (John Corbett). There has already been one sequel, and despite the sequels’ titles, Toula is not getting married again, as she is still married to that first non-Greek guy from the original movie. What both sequels do is let us spend more time with the large,...