Paul Mescal chats with ET at the London premiere of ‘Gladiator II,’ in theaters Nov. 22. The actor recalls singing Miley Cyrus’ ‘The Climb’ at karaoke in a now-viral TikTok, a press tour highlight that he jokes was a ‘very vulnerable moment.’ Paul also reacts to King Charles stepping out for his period epic, the royal’s first movie premiere since ascending the throne.