Three years ago today, millions of fans around the world watched Prince Harry and Duchess Meghan get married in and a star-studded ceremony at St. George's Chapel that included Oprah Winfrey.

Now, after an unlikely turn of events, the Sussexes have moved to the same town as Winfrey, Montecito, California.

Plus, Harry and Meghan, once heralded by royal watchers as the royal family's new rock stars, turned to Winfrey when they wanted to give a tell-all interview about their struggles as royals.

On Friday, Winfrey and Harry will launch a docuseries, "The Me You Can't See," that focuses on mental health, including Harry's own struggles, and marks the duke's latest foray into his and Meghan's new Hollywood-focused careers.

"To make that decision to receive [mental health] help is not a sign of weakness," Harry says in the trailer for the docuseries. "In today's world, more than ever, it is a sign of strength."

Harry and Meghan have relied on each other to get through the highs and lows of their three years of marriage.

They went from receiving the well wishes of the world on their wedding day, May 19, 2018, to getting rock star-worthy welcomes in overseas tours that took them from New Zealand to South Africa.

At home in the United Kingdom, the couple seemingly settled into life in Windsor, England. It was there where the Sussexes became a family of three, as Meghan gave birth to their first child, son Archie, on May 6, 2019.

Then, two years into their marriage, Harry and Meghan made a dramatic departure from royal life.

The couple announced in January 2020 that they would step down as senior working members of the royal family. They attended their final official royal engagement in March 2020.

"The decision that I have made for my wife and I to step back is not one I made lightly," Harry said in a speech shortly after he and Meghan revealed their decision publicly. "It was so many months of talks after so many years of challenges, and I know I haven't always gotten it right, but as far as this goes, there really was no other option."

It was not until one year later, when Harry and Meghan were interviewed by Winfrey, that the public learned how much the Sussexes really struggled in royal life.

"It's what you read in fairy tales, you think is what you know about the royals, right?" Meghan told Winfrey in the primetime TV interview. "So it's easy to have an image of it that is so far from reality."

"And that's what was really tricky over those past few years, is when the perception and the reality are two very different things and you're being judged on the perception but you're living the reality of it, there's a complete misalignment, and there's no way to explain that to people," she said.

PHOTO: This image provided by Harpo Productions shows Prince Harry, from left, and Meghan, The Duchess of Sussex, in conversation with Oprah Winfrey.
Joe Pugliese/Harpo Productions via AP
This image provided by Harpo Productions shows Prince Harry, from left, and Meghan, The Duchess of Sussex, in conversation with Oprah Winfrey.

Now settled into their new life in Meghan's home state of California, the Sussexes are forging ahead, signing lucrative production deals with Netflix and Spotify, writing a children's book, taking on new corporate and charity roles, speaking out on celebrity-hosted podcasts and TV talk shows and launching Archewell, the organization that oversees their nonprofit work as well as their audio and production ventures.

And in their coming year of marriage, Harry and Meghan will welcome their second child, a daughter.

"Now we've got our family," Harry told Winfrey about the upcoming birth of their daughter. "We've got, you know, the four of us and our two dogs."

As the Sussexes celebrate three years of marriage, here is a look back at their relationship.

PHOTO: Prince Harry and Meghan Markle attend an official photocall to announce their engagement at The Sunken Gardens at Kensington Palace on Nov. 27, 2017, in London.
Steve Back/Getty Images
Prince Harry and Meghan Markle attend an official photocall to announce their engagement at The Sunken Gardens at Kensington Palace on Nov. 27, 2017, in London.
PHOTO: Prince Harry, Duke of Sussex and Meghan Markle smile during their wedding service, conducted by the Archbishop of Canterbury Justin Welby, in St George's Chapel at Windsor Castle on May 19, 2018, in Windsor, England.
Wpa Pool/Getty Images, FILE
Prince Harry, Duke of Sussex and Meghan Markle smile during their wedding service, conducted by the Archbishop of Canterbury Justin Welby, in St George's Chapel at Windsor Castle on May 19, 2018, in Windsor, England.
PHOTO: Britain's Prince Harry, Duke of Sussex kisses his wife Meghan, Duchess of Sussex as they leave from the West Door of St George's Chapel, Windsor Castle on May 19, 2018, in Windsor England.
Wpa Pool/Getty Images, FILE
Britain's Prince Harry, Duke of Sussex kisses his wife Meghan, Duchess of Sussex as they leave from the West Door of St George's Chapel, Windsor Castle on May 19, 2018, in Windsor England.
PHOTO: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex on Sydney Harbour looking out at Sydney Opera House and Sydney Harbour Bridge during day two of the Invictus Games Sydney 2018 at Sydney Olympic Park on Oct. 21, 2018, in Sydney, Australia.
Chris Jackson/Getty Images
Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex on Sydney Harbour looking out at Sydney Opera House and Sydney Harbour Bridge during day two of the Invictus Games Sydney 2018 at Sydney Olympic Park on Oct. 21, 2018, in Sydney, Australia.
PHOTO: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex ride by carriage during Trooping The Colour 2018 on the Mall on June 9, 2018, in London.
Samir Hussein/WireImage via Getty Images
Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex ride by carriage during Trooping The Colour 2018 on the Mall on June 9, 2018, in London.
PHOTO: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex dance as they visit a Justice Desk initiative in Nyanga township, during their royal tour of South Africa on Sept. 23, 2019, in Cape Town, South Africa.
Chris Jackson/Getty Images, FILE
Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex dance as they visit a Justice Desk initiative in Nyanga township, during their royal tour of South Africa on Sept. 23, 2019, in Cape Town, South Africa.
PHOTO: Prince Harry, Duke of Sussex, Meghan, Duchess of Sussex and their son Archie Mountbatten-Windsor meet Archbishop Desmond Tutu and his daughter Thandeka Tutu-Gxashe during a royal tour of South Africa on Sept. 25, 2019 in Cape Town, South Africa.
Pool/samir Hussein/WireImage via Getty Images
Prince Harry, Duke of Sussex, Meghan, Duchess of Sussex and their son Archie Mountbatten-Windsor meet Archbishop Desmond Tutu and his daughter Thandeka Tutu-Gxashe at the Desmond & Leah Tutu Legacy Foundation during a royal tour of South Africa on Sept. 25, 2019 in Cape Town, South Africa.
PHOTO: Britain's Prince Harry and Meghan, Duchess of Sussex walk through a Redwoods forest in Rotorua, New Zealand, Oct. 31, 2018.
Pool/Reuters, FILE
Britain's Prince Harry and Meghan, Duchess of Sussex walk through a Redwoods forest in Rotorua, New Zealand, Oct. 31, 2018.
PHOTO: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend The Endeavour Fund Awards at Mansion House on March 05, 2020, in London.
Samir Hussein/WireImage via Getty Images, FILE
Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend The Endeavour Fund Awards at Mansion House on March 05, 2020, in London.
PHOTO: In this March 9, 2020, file photo, Prince Harry and Meghan, Duchess of Sussex, arrive for the annual Commonwealth Service at Westminster Abbey in London.
Henry Nicholls/Reuters, FILE
In this March 9, 2020, file photo, Prince Harry and Meghan, Duchess of Sussex, arrive for the annual Commonwealth Service at Westminster Abbey in London.
PHOTO: Prince Harry and Meghan, the Duchess of Sussex, speak about the importance of voting during the TIME100 special on ABC.
ABC
Prince Harry and Meghan, the Duchess of Sussex, speak about the importance of voting during the TIME100 special on ABC.
PHOTO: Prince Harry and Meghan, The Duke and Duchess of Sussex, give an interview to Oprah Winfrey that aired on March 7, 2021.
Joe Pugliese/Harpo Productions via Reuters
Prince Harry and Meghan, The Duke and Duchess of Sussex, give an interview to Oprah Winfrey that aired on March 7, 2021.