The 24-year-old was manager Rafael Benitez's top target this month after impressing with his performances in the MLS for Atlanta United, scoring 13 goals and registering 13 assists to help them win the MLS Cup last year.
Almirón is an attacking midfielder who has 12 caps and played for clubs in his homeland and Argentina before joining Atlanta in 2016.
A meteor hits during the blood moon eclipse! - CBBC Newsround
You can see that flash in this video. "It was a very exciting moment because I knew such a thing had never been recorded before". A blood moon is another name given to a total lunar eclipse, which happens when the Earth moves in between the sun and the moon.
'I think it is a great responsibility, something attractive for me, and I will try to offer the best I can to repay the trust the club put in me'.
If the Tyneside outfit can add another player or two to their squad before Thursday's transfer window closes, it will give the north east club a fighting chance of finishing towards mid-table. "We have someone who can score goals and give assists", said Benitez. Two years later, we couldn't be happier with what Miguel has contributed to the club, and that he is realizing his dream of playing in the Premier League.
The Paraguay global is coming off a huge season with Atlanta, scoring 13 goals and laying on 13 assists as he helped lead them to an MLS Cup triumph.
"The left-back/wing-back position is one we've been looking to strengthen for a while and we know he has quality, good delivery and is good going forward", he said. He's one of those players, as a defender, where you think "I've got him" and then he's away and gone in a flash. "I have accepted this challenge with a great deal of enthusiasm and I can't wait to start".