Sarah Ferguson has paid tribute to her sweet friend Diana

Last Friday was International Women's Day, and women around the world united in support of each other, Sarah Ferguson included.

The Duchess of York shared a series of images of inspiring women, which included the late Princess Diana, who she called 'a dear friend'. She also paid tribute to her daughters Princesses Eugenie and Beatrice.

She wrote, 'thinking of some of the strong women who've been part of my life - my late mother, my dear, departed friends Diana and Carolyn Cotterell and of course my fierce, beautiful, loving daughters Beatrice and Eugenie who make me proud every day.'

There have been rumours over the years of a feud between Diana and Fergie, and the Duchess has spoken out about their complicated relationship before.

She told Harper's Bazaar, in 2007, 'I really miss Diana. I loved her so much. Diana was one of the quickest wits I knew; nobody made me laugh like her. But because we were like siblings—actually, we were fourth cousins and our mothers, who went to school together, were also best friends—we rowed.'

The Duchess also revealed they weren't speaking when Diana passed away, 'And the saddest thing, at the end, we hadn't spoken for a year, though I never knew the reason, except that once Diana got something in her head....I tried, wrote letters, thinking whatever happened didn't matter, let's sort it out. And I knew she'd come back. In fact, the day before she died she rang a friend of mine and said, 'Where's that Red? I want to talk to her.'