The Queen has paid a half-hour visit to Kensington Palace to meet her new great-grandson, the son of the Duke and Duchess of Cambridge.
The new parents left St Mary's Hospital in west London on Tuesday evening, where the duke said they were yet to name the third in line to the throne.
They spent the night at the palace and they have now gone to Catherine's family in Bucklebury, Berkshire.
Other visitors to the palace included Prince Harry and Pippa Middleton.
After a morning of visitors, the duke and duchess were seen leaving Kensington Palace with their newborn at 13:00 BST.
The BBC's royal correspondent Luisa Baldini said there had been wide speculation that the couple would head to the maternal grandparents' home but it was not known how long they would stay.
Catherine is very close to her parents, Carole and Michael, and Prince William has previously said how comfortable he feels around them, she said.
"The house is large and private enough for the duke and duchess to bond with their newborn son," she added.'Very special'
The Queen visited without her husband, the Duke of Edinburgh, as he continues to recover from abdominal surgery.
She made the short journey from Buckingham Palace in a dark green Bentley.