Queen Elizabeth, Prince Philip reportedly host family get-together for platinum wedding anniversary

Queen Elizabeth and Prince Philip celebrated their platinum wedding anniversary on Monday. They will reportedly grace a small family get-together at Windsor Castle.

The website of Windsor Castle notes that it will be closed all day. It is expected that the royal family will have as much privacy as possible.

The Queen and Prince Philip's four children will likely be in attendance: Prince Charles, Princess Anne, Prince Andrew and Prince Edward. Charles has just celebrated his 69th birthday this week.

Other members of the royal family expected to attend the private dinner are the Queen’s older grandchildren, including Princes William and Harry. William's wife Kate Middleton, who is pregnant with their third baby, might be in attendance, too.

Princesses Beatrice and Eugenie, Zara Tindall and Peter Phillips will also likely join Elizabeth and Philip’s anniversary dinner, as will Zara's husband Mike Tindall and Peter's wife Autumn Phillips. It is unclear if Harry’s girlfriend Meghan Markle will join the platinum wedding anniversary celebration.

Ahead of the celebration, images were released showing the royal couple. According to BBC News, the images are part of a series by celebrity photographer Matt Holyoak.

In the photo, Elizabeth wears a cream dress from Angela Kelly, her dressmaker for the last 15 years. The photo shows the couple in the White Drawing Room at Windsor Castle, pictured against a platinum-textured backdrop. The queen is the first monarch in British history to celebrate a platinum wedding anniversary.

Elizabeth and Philip first met at the Royal Naval College in Dartmouth in 1939. The Queen was 13 years old at that time.

When she was still a Princess, her Majesty shared an insight into their courtship. In a letter to author Betty Shew, she supposedly confirmed that they would dance together at nightclubs Ciro's and Quaglino's in London. Shew was writing a book called Royal Wedding as a souvenir of their marriage.

The royal couple started writing letters to each other before eventually becoming formally engaged in 1947, following the Queen's 21st birthday. They tied the knot later in the same year, then married at Westminster Abbey in London on November 20, 1947.

There have been claims that Philip cheated on the Queen, that he allegedly took a mystery woman to the royal yacht Britannia. None of the claims about Philip were ever proven, the Daily Mail notes. On their 50th wedding anniversary, the queen described her husband as "quite simply my strength and stay all these years.”