British actress Miriam Margolyes is convinced Hollywood beauty Cate Blanchett is the only actress who could play her in a biopic - if she wore a fat suit. The Harry Potter star admits there is no actress "fat or clever enough" to play her, but at least Blanchett would be intellectually suitable for the role. Margolyes says, "I don't know that there' anybody that can play me. "I've never met anybody who's as fat or as clever. Maybe Cate Blanchett in a fat suit."