Kate Middleton, Meghan Markle, William, and Harry Pictures

Will and Kate's Engagement Photocall

After formally announcing their engagement, Will and Kate stepped out for a celebratory appearance at St. James's Palace in November 2010.

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Harry and Meghan's Engagement Photocall

Image Source: Getty / Samir Hussein

Harry and Meghan also did the same in November 2017, only they opted for Kensington Palace's Sunken Gardens.

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Will and Kate's First Joint Interview

The couple sat down for their first joint interview after announcing their engagement in November 2010. Will and Kate talked about everything, including how Will popped the question and Kate's engagement ring.

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Harry and Meghan's First Joint Interview

Harry and Meghan also gave their first interview to BBC after getting engaged in November 2017. Harry talked about how he wooed Meghan and what Princess Diana would think of her, while Meghan spoke about the night Harry proposed and how they met.

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Will and Kate's First Royal Engagement

Image Source: Getty / Chris Jackson

The couple's first official engagement was in December 2010 when Will and Kate attended a Christmas event for the Teenage Cancer Trust in Fakenham, England.

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Harry and Meghan's First Royal Engagement

Image Source: Getty / WPA Pool

Less than a week after announcing their engagement, Harry and Meghan stepped out for their first royal appearance together in Nottingham, England. Unlike Will and Kate, Harry and Meghan showed plenty of PDA.

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Will and Kate's First Christmas Service at Sandringham Together

Image Source: Getty / Chris Jackson

The first time Will brought Kate along for the royal family's annual Christmas service at Sandringham was in December 2011. Just like Trooping the Colour, only married couples can attend.

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Harry and Meghan's First Christmas Service at Sandringham Together

Image Source: Getty / Chris Jackson

However, the queen did make an exception for Harry and Meghan in December 2017 when she allowed the duchess to attend before their May 2018 nuptials.

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Will and Kate's First Royal Visit to Scotland Together

Image Source: Getty / WPA Pool

In February 2011, the pair returned to the University of St. Andrews in Scotland to launch a fundraising campaign for a new scholarship. The school holds a special place in Will and Kate's hearts, given that it's where the couple first met.

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Harry and Meghan's First Royal Visit to Scotland Together

Image Source: Getty / Samir Hussein

Harry and Meghan took an exciting trip to Scotland in February 2018. In addition to meeting with the people of Edinburgh, a sassy pony named Cruachan attempted to take a small bite out of Harry. LOL!

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Will and Kate's First Commonwealth Day Service Together

Image Source: Getty / Chris Jackson

Just two months before Princess Charlotte's arrival, Will and Kate attended their first Commonwealth Day service at Westminster Abbey in March 2015.

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Harry and Meghan's First Commonwealth Day Service Together

Image Source: Getty / Samir Hussein

Harry and Meghan attended their first Commonwealth Day service together in March 2018, and it also doubled as Meghan's first official engagement with Queen Elizabeth II.

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Will and Kate's First Anzac Day Service Together

Image Source: Getty / Danny Martindale

Will and Kate's first Anzac Day service took place during their tour of Australia and New Zealand in April 2014. The holiday honours all of those who served and died during wars, conflicts, and peacekeeping operations.

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Harry and Meghan's First Anzac Day Service Together

Image Source: Getty / WPA Pool

In April 2018, Harry and Meghan represented the royal family during the service at Hyde Park Corner in London.

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Will and Kate's Wedding

Image Source: Getty / Chris Jackson

One of the most memorable moments in British royal history was when Will and Kate tied the knot at Westminster Abbey in April 2011.

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Harry and Meghan's Wedding

Image Source: Getty / WPA Pool

Also on the list are Harry and Meghan's May 2018 nuptials at St. George's Chapel at Windsor Castle.

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Will and Kate's First Buckingham Palace Garden Party Together

Image Source: Getty / Anwar Hussein

Will and Kate's first garden party at Buckingham Palace took place during the queen's Diamond Jubilee in May 2012.

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Harry and Meghan's First Buckingham Palace Garden Party Together

Image Source: Getty / Chris Jackson

Harry and Meghan's first official appearance as a married couple took place during Prince Charles's 70th birthday celebration, just days after their nuptials. Everything appeared to go smoothly — that is, until a bee went rogue and attacked Harry while he was giving a speech.

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Will and Kate's First Trooping the Colour Together

Image Source: Getty / Oli Scarff

Even though Will and Kate had been dating since college, the couple didn't make their debut at Trooping the Colour until June 2011. Royal protocol states that only married couples can attend, so the duo attended two months after their wedding.

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Harry and Meghan's First Trooping the Colour Together

Image Source: Getty / Chris Jackson

Harry and Meghan made their Buckingham Palace balcony debut during Trooping the Colour in June 2018, just one month after tying the knot.

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Will and Kate's Royal Ascot Debut

Image Source: Getty / Kirstin Sinclair

Will and Kate were all smiles during their Royal Ascot debut in June 2016.

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Harry and Meghan's Royal Ascot Debut

Image Source: Getty / Anwar Hussein

Two years later, Meghan and Harry made their Royal Ascot debut (in similar outfits, I might add).

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