Young thesp Brighid Fleming, who played Gerard Butler’s daughter in the 2009 Lionsgate pic “Gamer,” has landed the young female lead in Jason Reitman’s “Labor Day,” which stars Kate Winslet and Josh Brolin.An adaptation of Joyce Maynard’s novel of the same name, coming-of-age pic is being backed by Indian Paintbrush and Paramount, which had no comment on the casting. Reitman is writing and directing the film, which follows Frank Chambers (Brolin), an escaped convict who seeks shelter with a depressed single mom (Winslet) and her teen son over Labor Day weekend. “Changeling” thesp Gattlin Griffith landed the young male lead earlier on Tuesday. While Fleming has not yet closed a deal, she beat out many young thesps for the coveted offer to play Eleanor, the mysterious object of Griffith’s affection who seems to know everything about the world that he doesn’t. Pic’s supporting cast includes James van der Beek, Tom Lipinski and Maika Monroe. Reitman and his Right of Way Films partner Helen Estabrook are producing with Lianne Halfon and Russell Smith of Mr. Mudd. Steven Rales and Mark Roybal of co-financier Indian Paintbrush will exec produce. In addition to “Gamer,” Fleming previously appeared in J.T. Petty’s 2008 horror pic “The Burrowers,” as well as an uncredited role in “Alice in Wonderland.” She’s repped by Pantheon Talent and manager Mara Santino of Luber Roklin Entertainment.