Prince charles and diana

1986 Welcome to the Christmas card, Tigga! The sweet pooch looked so comfy on Princess Diana's lap, while the children--in typical kid fashion--just couldn't hold still and smile for the camera. Still, this group shot is adorable.

Wow, they looked so happy. 😓

In pictures: the life and times of Diana, Princess of Wales

A look back at two decades of the royal duo.

Princess Diana Spencer on Instagram: “39 years ago today on Wednesday, July 29, 1981, Lady Diana Spencer, a 20 year old kindergarten teacher, married Charles, Prince of Wales,…”

The Crown revisits Prince Charles and Princess Diana’s dramatic tour of Australia, where her popularity eclipsed his.

Velvey 💸🪞🪄 on Instagram: “Back when they first met, Prince Charles was 29 and Princess Diana was 16. “I remember thinking what a very jolly and amusing and…”

PRINCESS Diana described Charles as “all over me… like a bad rash” during their first evening together as a couple. But Diana was “traumatised” by Charles’s resp…

💖The British Royal Family💖 on Instagram: “💖Lovely Couple💖 💖Happy Day, Followers!💖 #Royal #RoyalFamily #RoyalStyle #Wedding #royalweddings #PrinceofWales #PrinceCharles…”

Insider has gathered the best rare photos from the event which marked Diana's entrance into the royal family almost four decades ago.