Amid headlines of movie stars melting down, Oscar-winner Cate Blanchett (pictured) says she’s happy with the perception she’s, well, boring off-screen. “There’s a happy understanding that I am quite dull,” Blanchett told “In the Mixx” host Gina Glickman Giordan at a bash celebrating her Gotham magazine cover. “I am sorry, I am prepared to keep that misconception alive.” Blanchett attended the fete with the cast of her latest show, “Uncle Vanya.” The chat airs on the East Hampton Studios show Saturday.