THE OC star Mischa Barton is in talks to don blue tights for the role of SUPERGIRL. The new film would be the first big-screen venture for the super-heroine since the 1984 version of the film, which starred Helen Slater. Warner Bros studio executives are keen to cast the actress and have reportedly met with her regarding the role. The movie's release would coincide with the release of SUPERMAN RETURNS this summer (06), according to website