Miley Cyrus and Liam Hemsworth finally made their red carpet return as a couple at the premiere of "Thor: Ragnarok." The famous couple was there to support Liam's older brother, Chris. The on again off again couple seemed more in love than ever as they cozied up for photographers. The pair haven't attended a public event together since 2016 and haven't walked a red carpet as a couple since 2013. The pair first started dating in 2009 when they co-stared in "The Last Song.