Robin Williams will be going Gently Down The Stream, according to reports.
The funnyman is apparently set to join the star-studded cast of the comedy, originally known as The Wedding, which already includes Robert De Niro, Diane Keaton, Katherine Heigl, Susan Sarandon, Amanda Seyfried and Topher Grace.
Amanda dropped the news to Showbiz 411, saying: "I just heard about Robin Williams joining Gently Down The Stream."
She didn't reveal any more about his upcoming role.
Robert and Diane are lined up for the leading roles in the film, which follows a dysfunctional divorced couple who pretend to still be together during their adopted son's wedding for the sake of the birth mother.
There's no word yet as to which of the actresses will be taking the bride role in Justin Zackham's film, with Grace expected to be cast as the groom.
Filming is set to begin this July in Connecticut.
Robin, who won an Oscar for his role in Good Will Hunting, last appeared in Old Dogs, Night At The Museum: Battle Of The Smithsonian and World's Greatest Dad.