With Pedro Almodovar's 'Broken Embraces,' this year's Toronto Film Festival marks the fourth collaboration between the Spanish director and Penelope Cruz. But while this duo may be the most demonstrative partnership in film, it certainly is not the most prolific. From France's Isabelle Huppert and Claude Chabrol to the US' Martin Scorsese and Robert DeNiro, modern film overflows with filmmakers and their muses. To celebrate the Canadian premiere of 'Broken Embraces,' we pick the top ten pairings in cinema.