Topher Grace has joined the cast of the dramedy "Gently Down the Stream" says The Wrap
The film centers on a woman who confronts her ex-husband and his new girlfriend.
Grace will play Jared, the son of the characters played by Robert De Niro and Diane Keaton in the pic.
He’s a doctor who ends up falling in love with a young Latin woman, awkward since she's his adopted brother’s sister.
Katherine Heigl and Amanda Seyfried co star.
Justin Zackham, who wrote the script for 2007's "The Bucket List," wrote and will direct.
Harry Ufland and Mary Jane Ufland and Clay Pecorin are producing the film.
The film is slated to begin shooting in July in Connecticut.