The Man Utd and England star shared a sweet picture from the nuptials on Saturday on his Instagram page.
In a heartfelt caption, Harry, 29, said the nuptials were “a day I’ll never forget”.
Harry and Fern, 27, tied the knot at the Chateau de Varennes in the South of France, which is voted one of the top ten wedding venues in the world.
It is understood the wedding party flew by private jet to France on Thursday.
Fern was then joined by her bridesmaids – including England goalie Jordan Pickford’s wife Megan Davidson.
Harry’s sister Daisy, 21, was maid of honour for the big event, while his brothers Laurence, 25, and Joe, 30, also jetted in.
It came after the couple had a registry office ceremony in Crewe last month to obtain a UK marriage certificate.
Around 30 guests attended the fairytale ceremony.
The happy day is sure to come as a relief for the couple, who found themselves at the centre of a bomb scare in May.
Centre-back Harry later slammed Utd fans for sending the threat, which came during a tough season for the club.
He said: “Obviously I’m going to be criticised. Manchester United paid a large sum of money for me, it is one of the most loved clubs in the world and one of the most hated.
“We know we are under the most scrutiny. I totally accept criticism when we concede goals or make mistakes. I’m big enough to accept people getting on my back and saying I can improve.
“But there is a line where we are human beings. I do have a family.
“It doesn’t affect me too much but when it comes to bomb threats, it is more about family — my fiancée, Fern.