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It is reported that the former First Lady played a “key role” in getting the pair together and is devastated she will not be there for the big day.

Despite Harry’s friendship with Barack Obama, which stems from the Invictus Games, the former president and Michelle won’t be invited as it would cause a “diplomatic headache”.

A source said: "Michelle had a hand in introducing Harry to Meghan, 36.

"In his mind there wouldn’t be a wedding without her and that is reason enough to invite them.

(Image: getty)

"He was not happy such a legitimate reason was ignored."

If the Obamas were invited and while Donald Trump wasn't, it would be seen as a huge snub and could cause political tensions.

This week it was confirmed neither the Obamas, President Trump or Prime Minister Theresa May will attend.

(Image: getty)

The official reasoning is that it is not necessary to invite political leaders because Harry, 33, unlike his brother William, is not likely to become king.

A Kensington Palace spokesman said: "It has been decided that an official list of political leaders - both UK and international - is not required for Prince Harry and Ms Markle's wedding.

"Her Majesty's Government was consulted on this decision, which was taken by The Royal Household."