David Robert Mitchell, writer-director of “Myth of the American Sleepover,” has been set to direct romance drama “Ella Walks on the Beach” from his own script.Mitchell is re-teaming with “Myth” producer Adele Romanski, who will produce “Ella” with Benderspink’s Chris Bender, JC Spink and Jake Weiner serving as exec producers. “Ella” centers around a single woman traveling along an iconic California beach. “Myth,” which follows four teens on the last night of summer, showed at SXSW and Cannes last year. Romanski’s credits include “Freebie” and “Black Rock.” Benderspink’s producing “The Mighty” at Paramount, “Undying Love” at Warners and “Burt Wonderstone” at New Line. Mitchell is managed by Benderspink.