Cara Delevingne has begun dating actor Jack O'Connell. The model met the 24-year-old on the set of forthcoming movie, 'Tulip Fever', in which they both star. An insider told The Sun newspaper: "Jack and Cara get on really well. So far their relationship is very casual but she's a big fan of him." The source continued: "They've been on a few dates and been seeing each other quite often but it's not yet serious.