The Queen and Prince Philip have been side by side for 73 years, supporting each other through the lows and enjoying the highs together.
They are very private about their relationship, but the Queen has made several loving comments about her husband over the years, once famously describing him as her "constant strength and guide".
Only know closest to them know what they are like as a couple behind closed doors, and they are always extremely professional towards each other at events and engagements - a sheer contrast to the younger royals like Meghan Markle, Prince Harry and the Duke and Duchess of Cambridge who are often seen holding hands while out and about.
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