The smitten couple have asked the former US President and his wife Michelle to attend their big day at Windsor Castle on Saturday, May 19.
A Royal source told us Harry and Meghan “want to do things their own way”, despite aides advising them to hold back on the invite.
It was feared such a move would outrage US President Donald Trump – who has reportedly not been invited – and rock diplomatic ties with his country.
But Harry and Meghan have turned their noses up at the risk by sending out the RSVP, leaving the final decision to Obama himself.
The source told Daily Star Online: “The invitations are going out now, but Mr and Mrs Obama still have to respond.
“I am very, very sure they will attend though.
Harry and Meghan want to do things their own way.
“They are inviting their own friends, and not on the advice of aides.”
Harry and Obama have a genuine friendship that goes beyond work, with the former US president interviewed by the prince recently on BBC Radio 4’s Today programme.
When he and Meghan announced they were engaged to be married, Obama even tweeted: “We wish you a lifetime of joy and happiness together.”