Olive Uniacke is the step-daughter of David Heyman, the millionaire producer of the #39;Harry Potter#39; movies, in which Daniel plays the titular character. Daniel Radcliffe#39;s mystery new girl has been revealed to be 19-year-old Olive Uniacke – the step-daughter of the producer of the #39;Harry Potter#39; movies. Daniel Radcliffe#39;s mystery girl has been named. The 21-year-old actor has been seen with a pretty brunette in recent weeks and it can now be revealed his new romantic interest
