I'm not sure a person's age should matter in the movie business. It's acting, after all. And in this age of makeup and special effects, it should matter even less. I'm remembering that Anne Bancroft did a good job as Dustin Hoffman's mother even though she was only six years older than him in The Graduate. And I could cite many other examples, including our own Heath Ledger, who convincingly aged 20 years in Brokeback Mountain.