Sydney Sweeney is doing what so few stars in Hollywood willingly do: she's confronting one of the biggest tabloid questions head-on. And she's doing it strapped to a lie detector, no less! The Euphoria sweetheart sat down for Vanity Fair's famous polygraph test, where her The Housemaid co-star Amanda Seyfried wasted zero time getting straight to the subject everyone online loves to whisper about.