While work remains to finalise a formal agreement with Messi, the MLS stated.
Messi spent the majority of his European football career at Barcelona where he started out as a youth player and went on to become the one of most successful footballers, winning 10 La Liga titles and four Champions League titles.
In his recent interview, the footballer expressed his desire to return to Camp Nou after the club's financial woes two years ago forced him to leave but added he didn't want to come back under similar circumstances.
"I really wanted, I was very excited to be able to return, but, on the other hand, after having experienced what I experienced and the exit I had, I did not want to be in the same situation again: wait to see what was going to happen and leave my future in someone else’s hands, so to speak," he said.
The move to Inter Miami has surprised many, given that the side - co-owned by David Beckham - is currently at the bottom of the Eastern Conference while head coach Phil Neville was fired last week.
So no doubt Messi's arrival will excite both the team and fans.
Here are some of the best reactions to Messi's move to Inter Miami:
\u201cSpeed\u2019s reaction to Messi going to the MLS \ud83d\udc40\ud83d\ude2d\u201d
\u201cMLS and US Soccer genuinely have the opportunity to exponentially grow this game in this country over the next couple years\n\nI really hope they get this right. This is the chance of a lifetime\u201d
\u201cHard to wrap my head around how big this actually is, one of the most famous people in the entire world coming to play in the US, all eyes on the American footy scene just 3 years before we host the World Cup\u201d