Best Moments From Prince Harry and Meghan Markle's First Royal Engagement: Pics!

From the fashion to the PDA, ET breaks down the most memorable moments from their first public event since announcing their engagement.

Prince Harry and Meghan Markle were all smiles during their first public event as an engaged couple!

Just four days after Kensington Palace formally announced the exciting news, the lovebirds stepped out for the Terrence Higgins Trust World AIDS Day charity fair in Nottingham, England, on Friday.

From their stellar fashion to the adorable PDA, ET's breaking down all the most memorable moments from their first royal duties together.

1. Prince Harry and Meghan Markle bundle up in matching coats.

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The 33-year-old royal opted for black slacks, suede shoes, a beige scarf and tailored navy jacket, which perfectly complemented his fiancée's ensemble. Markle donned a look that was quite similar to Kate Middleton's repertoire: a double-breasted Elodie coat by Canadian designer Mackage with a tan skirt and black boots. Like the Duchess of Cambridge, Markle's jacket was a recycled piece. She was first spotted wearing the coat, which retails for $790, last December at the Toronto airport.

2. All smiles while meeting the crowd!

The Suits star appeared to have a permanent grin on her face while shaking hands with members of the cheering crowd outside the National Justice Museum. If you watch the video above, pay attention to the 0:19 mark. Harry and Markle adorably meet each other on the same side of the gates, placing their arms around one another.

3. Check out that ring!

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The public outing was the perfect excuse for Markle to flaunt her massive sparkler, which was custom-designed by Prince Harry and features diamonds from his late mother, Princess Diana's, jewelry collection.

4. Feeling gracious.

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The bride-to-be appeared to be in great spirits while accepting gifts, like flowers and letters, from the crowd.

5. Markle ditches the jacket, shows off her regal, chic look!

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After braving the chilly temperatures, Harry and Markle headed indoors, where we got a peek at the Los Angeles native's trendy ensemble. All eyes were on Markle, clad in a Wolford Portland turtleneck, tan Joseph 'Laurel' full midi skirt and boots by Kurt Geiger.

6. Listening and learning.

Harry and the 36-year-old humanitarian seemed to be having a blast while learning how the Terrence Higgins Trust is working to provide support to people living with HIV and AIDS.

7. Can't get enough of each other!

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Does it get any sweeter than this? The adorable duo were spotted laughing and holding hands inside the Nottingham Academy.

8. Feeling loved.

Students at Nottingham Academy seemed to be just as smitten by Markle as Prince Harry. As she and the royal said their goodbyes, they sent her off with a beautiful posy!