Duchess Catherine

Duchess Catherine

Britain's Duchess spent Father's Day with her dad Michael Middleton on Sunday (16.06.13).

The pregnant royal - who is due to give birth to her first child next month - spent quality time with her father in her hometown of Bucklebury, Berkshire, to mark the special occasion while her husband, Prince William, competed in a charity polo match with his brother Prince Harry.

A source told Us Weekly that the pair enjoyed a spot of lunch "at a local restaurant", but it's not known whether Catherine, 31, and Michael, 63, were joined by her siblings Pippa, 29, or James, 26.

The duchess completed her final royal engagement before taking maternity leave on Saturday (15.06.13) when she showed her support to Queen Elizabeth on her official birthday.

The royal family attended the Trooping the Colour military ceremony, which included a 41-gun salute and an RAF flypast, outside Buckingham Palace to mark the British monarch's 87th birthday.

It was recently reported that the queen has extended an invitation to Catherine, William, 30, and their impending bundle of joy to stay with her at her Balmoral estate in Scotland in early August so she can spend quality time with her great-grandchild.