Hiam Abbas, who played Marcia Roy in HBO’s “Succession,” and Tunisian-Egyptian star Hend Sabri (“Four Daughters,” “Finding Ola”) are set to star in “Your Turn, 203,” a social comedy set in a battered Beirut. Abbas plays a housewife named Aida who replies to a casting call for extras to make ends meet. “Your Turn, 203,” which is a working title, is to be directed by Lebanese filmmaker Cynthia Sawma, making her feature film debut after working as a casting director on major Arab films, including Nadine Labaki’s “Capernaum,” and subsequently making several award-winning shorts. Lebanon’s Abbout Prods. and France’s Wheelhouse Prods. are lead-producing, with Mohamed Hefzy’s Film Clinic, Gianluca Chakra’s Front Row and Lebanese producer Antoine Khelife also on board.  Abbout Prods. chief Georges Schoucair and Sawma will be in Cannes to meet with their production partners. Popular on Variety The Party Film Sales will be handling international distribution on the film.…