Joaquin Phoenix is not only flexible — he’s also engaged. The 40-year-old actor was a guest on Late Show on Monday, and he surprised David Letterman with the news that he’s getting married. The revelation came after Phoenix told a story in which his fiance, whose name he didn’t mention, encouraged him to harness his “hog.” Phoenix then retracted his account the next morning while appearing on Good Morning America and Live! With Kelly and Michael.