Emma Watson

Her upfront £2m fee for Beauty And The Beast (plus a share in profits believed to be £10m) must have topped up Emma’s £43m Harry Potter stash nicely. Kind-hearted with her cash (she donated £1m to a fund to help victims of sexual harassment), she saves money by flying easyjet and turned up at 2016’s Met Gala wearing a dress made from actual rubbish. Just like Oscar the Grouch.