Naomi Watts and Bill Murray are to lead the cast of 'The Friend'.The pair are attached to star in the indie picture based on Sigrid Nunez's New York Times best-selling novel from writer-director duo Scott McGehee and David Siegel.Other cast members include Sarah Pidgeon, Constance Wu, Ann Dowd and Noma Dumezweni.'The Friend' follows a New York writer following the unexpected death of her lifelong pal and mentor as she is left to deal with his complicated literary legacy, three eccentric former wives and a broken-hearted Great Dane called Apollo.The flick is currently in production in New York and is being produced by McGehee and Siegel for their Big Creek Projects company.Naomi is involved as an executive producer on the film along with Mike Spreter for Big Creek and Margaret Chermin for 3dot Productions.Watts, 55, explained last year that she was "proud" to still...