Miley Cyrus and Maxx Morando are engaged. Miley showed off her engagement ring at the ‘Avatar: Fire and Ash’ premiere, as she recorded an original song, ‘Dream as One,’ for the sequel, in theaters on Dec. 19. A source tells ET, ‘The custom gold and diamond ring was designed by jeweler Jacquie Aiche. The ring is a cushion-cut stone set in a 14-karat yellow gold band.’ Plus, ET’s Denny Directo chats with the stars of the film — including Oscar winner Zoe Saldaña — and director James Cameron.