Harry and Meghan married during a glittering ceremony on May 19, 2018, and are likely to mark their milestone privately at their Californian home.
The wedding heralded a new chapter for the monarchy as it was welcoming a person of mixed race into the family for the first time in centuries.
But just 18 months after exchanging their vows the Sussexes moved to North America with their son Archie and have never permanently returned to their UK home.
A UK poll carried out on Monday found 44 per cent of 4567 adults questioned thought the couple should no longer be a duke and duchess.
While 20 per cent believed they should keep their titles but not use them, 17 per cent said they should not lose their titles or stop using them and 20 per cent did not know.
The poll came a day before documents showed a liquidator had been instructed to wind up the couple's Sussex Royal company, which trades as MWX Trading Limited.
Information on the site shows that a special resolution to wind up the company was submitted on May 4, before a voluntary liquidator was appointed on Tuesday.
The past few months have been a tumultuous period for the couple following their bombshell TV interview with Oprah Winfrey.
Meghan and Harry laid bare their brief life as a working royal couple, alleging a member of the family made a racist comment about their son, and explained the duchess had suicidal thoughts but her approaches to the monarchy for help were turned down.
The Duke of Edinburgh's funeral in April briefly brought Harry back into the fold, and he was pictured moments after the ceremony looking at ease and chatting with his brother the Duke of Cambridge.
A few days after their wedding anniversary Harry and Meghan, who is expecting a daughter in the summer, will appear in the first episode of the duke's mental health documentary series with Oprah Winfrey.
© PAA 2021