Kate Winslet gets a kick out of being mistaken for Cate Blanchett. The ‘Titanic’ actress, 48, opened up about movie fans regularly mixing her up with her fellow Oscar-winner Cate, 54, despite the pair looking virtually nothing alike and being from other sides of the world. British-born Kate told People at the premiere of her HBO show ‘The Regime’ at the American Museum of Natural History in New York City about being falsely identified as Australian Cate: “That happens a lot, yeah.” When asked if she ever goes along with the mix-up and pretends to fans she is Cate, Kate admitted: “No, we do, ye…