British actress Lily James stuck to a liquid diet while shooting the new Disney movie “Cinderella” because her corset was tied too tight for her to properly digest solid foods. The “Downton Abbey” star took on the titular character in Sir Kenneth Branagh’s live-action adaptation of the classic fairytale, but she admits she had to suffer for her art to ensure she didn’t burp in the face of her Prince Charming, played by former “Game of Thrones” actor Richard Madden.