Knock, knock. Who’s there? Oh, hello: It’s Sienna Miller, showing up at ex-boyfriend Jude Law‘s door in NYC on Friday. The twosome, who split in 2006, have been spending quite a lot of time together lately, fueling rumors that the formerly engaged duo are rekindling the flames of romance past. They’re also both starring on Broadway, Sienna in After Miss Julie and Jude in Hamlet.