The former Suits actress, 36, was previously married to film producer Trevor Engelson, who she wed back in 2011, the same year Prince William tied the knot with Kate Middleton.
And with excitement at fever pitch over what Meghans royal wedding dress will look like, here we take a look at what Meghan chose for her first wedding gown.
Thankfully, theres just one day left to wait to see what style Meghan has chosen…
MEGHANS FIRST WHITE DRESS
For her first wedding, Meghan opted for a white bohemian-style, strapless, floor-length gown with a notch neckline.
The plain dress was completed with pleats at the front and an embellished belt, which added a touch of sparkle.
There was no intricate lace detailing, no plunging show-stopper back and no long train or veil.
The simplicity of the dress fitted the laid back vibe of the wedding, which was thrown on a beach in Jamaica.
Its likely the gown for her Windsor Castle wedding to Prince Harry may be somewhat more elaborate.
Meghan may decide to be bold and go for a coloured frock, ignoring the royal tradition of white gowns. After all, blush and nude tones are all over the catwalks and Meghan is fashion-conscious.
It is common for second-time brides to shun the big white wedding dress altogether, in favour of more subtle wedding gowns, perhaps a heavily embellished design is on Meghans wish-list.
Meghan and Trevor married on September 10 2011 at the Jamaica Inn in Ocho Rios, Jamaica.
Their ceremony took place in front of 102 guests and it fell over four days.
Thats quite different to Harry and Meghans 800 guests – and their big day is lasting just one day.
Pictures of Meghan and Trevors wedding reception show it looking like quite a wild affair, with the couple throwing a beach party for their friends, with Meghan dancing barefoot on the sand with her white gown covered at the feet.
The couple apparently treated their friends to a barbecue feast on the beach and shots, partying long into the night
Its also been reported that Meghan and Trevor were lifted up on their chairs for a traditional chair dance, as well as taking part in a wheelbarrow race (which, it should be added, Meghan did in a yellow bikini).
While not many pictures of their celebration have been published, one that we obtained shows what looks like four of Meghans bridesmaids joining her on the dancefloor.
The girls are wearing pale pink strapless gowns and look like theyre enjoying the laid back atmosphere on the beach.
A source has previously said: The ceremony was over very quickly, in about 15 minutes. Then everyone hit the dance floor. It seemed they all just wanted to party.
Trevor met Meghan in 2004 and the pair became engaged six years later in 2010.
He was born on October 23 1976 in New York City. At 41, he is five years older than Meghan.
Now an actor, film producer and talent manager, he started off his career as a production assistant.
In fact, Trevor produced the 2010 film Remember Me, which starred Robert Pattinson and featured a cameo from Meghan.
However, by August 2013, the pair had divorced, citing irreconcilable differences.
According to insiders, it was the strain of a long-distance relationship – with Meghan working in Toronto, Canada on Suits while Trevor was in Los Angeles – that saw the end of their nine-year relationship.
In an ITV documentary, Prince Harry and Meghan: Truly, Madly, Deeply, which aired earlier this year, Meghans friend Abby Wathen, who she starred in film Random Encounters with, spoke of how empowered Meghan felt after her divorce.
We became instant friends. She always knew she would be successful, she just…knew it. She knows what she wants and she gets it, Abby said.
Meghan and I bonded because I was married and she was getting married. I was invited to her wedding but I couldnt go. Then we both went through divorce, so we bonded on that too.
I was destroyed, but she was empowered. She took her power back. It wasnt the right relationship for her, so she moved on.
Meghan and Harry will tie the knot at midday at St Georges Chapel in Windsor on Saturday 19 May.
Kensington Palace revealed today that Prince Charles will walk Meghan down the aisle after her father was forced to pull out of the role to undergo emergency heart surgery.