Sienna Miller's lover Rhys Ifans bought her a broomstick because he believes she is a witch who has cast a spell over him.The 'Factory Girl' actress - who has denied she is dating the Welsh actor,despite being frequently pictured with him - thought it was adorable when Rhys surprised her with the unique gift. Sienna said: "My housemate Rhys bought me a broomstick because he thinks I'm a witch. It's a cute little white one. I love it!"Last week, it was claimed Rhys has asked Sienna to marry him five times. Although Sienna, 25, has spurned 39-year-old Rhys' offers of marriage, she is said to be besotted with the 'Notting Hill' star, and is considering the possibility of getting engaged.A source close to the actress said: "Sienna is probably the happiest I've ever seen her. She and Rhys are perfect together."They are having such a great time, I wouldn't be surprised if they got engaged."