 George Frederick was a youth with little interest in parenting a girl, and so Caroline soon moved to Lützenburg outside Berlin, where she entered into the care of her new guardians, Frederick, Elector of Brandenburg, and his wife, Sophia Charlotte, who had been a friend of Eleonore Erdmuthe.Frederick and Sophia Charlotte became king and queen of Prussia in 1701.The queen was the daughter of Dowager Electress Sophia of Hanover, and the sister of George, Elector of Hanover.