Prince William and Princess Kate are moving on up.

RadarOnline.com can reveal the royal family – along with their three children, Prince George , 12, Princess Charlotte, 10, and Prince Louis , 7 – will be relocating from Adelaide Cottage to Forest Lodge, an eight-bedroom Georgian mansion on the grounds of Windsor Great Park, this fall.

"This is where William and Kate want to grow old together," a source told RadarOnline.com , "and create magical memories, even after they take the crown." Article continues below advertisement

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It will be a new beginning for the family. Their time at Adelaide has been marked

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