We’ve got a couple of “promising duos” casting stories to report this afternoon.  First up, Michael Douglas and Diane Keaton are attached to star in the comedy And So It Goes….  Per Deadline, Douglas will play “a self-absorbed and eccentric” realtor who is thrown for a loop when his estranged son saddles him with a granddaughter Douglas’ character never knew.  He enlists the help of his “determined and loveable neighbor,” played by Keaton, who pulls him out of his selfish life.  Mark Andrus (As Good As It Gets) wrote the script and PJ Hogan (My Best Friend’s Wedding) is set to direct, with production slated to get underway in the spring.

Hit the jump for news concerning the possible pairing of Ewan McGregor and Kate Hudson.

Australian-born actress Toni Collette is set to reunite with fellow Aussie PJ Hogan (Confessions of a Shopaholic) for the director’s latest project Mental. The two previously worked together on the 1994 Australian comedy Muriel’s Wedding, a film that served as a breakout hit for both Collette and Hogan. Variety reports that Mental, an Australian production, will center on a family and its “crazy but charismatic nanny,” because crazy and charismatic are the most desirable traits when choosing a nanny. Hogan is penning the script, and Screen Australia will be backing the project. Collette will next be seen in the Fright Night remake, which hits theaters August 19^th.