Britain's Prince Harry and Meghan Markle stand during their wedding ceremony at St. George's Chapel in Windsor Castle in Windsor, near London, England. (Photo / AP)

Meghan had arrived with her mother from Cliveden House moments earlier, while a visibly nervous Harry was waiting at the altar with his best man, Prince William.

The two brothers had been exchanging whispers and quiet laughs in the moments leading up to the bride's arrival, but as she stepped into the Chapel, a reverential hush flooded the room, and the groom's eyes lit up.

It's no wonder: Meghan looked absolutely breathtaking in an incredibly simple white gown by acclaimed British designer, Clare Waight Kelle, which featured a demure neckline and full veil, as she glided down the aisle with Prince Charles, who had stepped in for her sick father at the last minute.

Once news broke of their relationship — five months in — the pair tried to keep their occasional public outings low-key, but it was clear to everyone that they were completely smitten.

Less than eighteen months on, and they were engaged.

Now, as Harry and Meghan publicly pledge their lives to one another, it's the stunning beginning to a brand-new chapter in their fairytale love story.