Daily Star's biggest headlines straight to your inbox!Lady Louise Windsor could be the Royal Family's 'secret weapon', and has been tipped to play an 'important role' in a new 'slimmed-down monarchy' by one royal expert.The 17-year-old daughter of Prince Edward typically stays out of the limelight, but her impressive performance in the BBC's new Prince Philip documentary has people talking. Prince Philip: The Royal Family Remembers aired this week to commemorate the late Duke.