52-year-old was captain of Soca Warriors at 2006 World Cup and takes reigns after being sacked from only other manager role in Australia
Amorim has agreed a contract at Old Trafford until June 2027, with the option for a further year.
Ruben Amorim has revealed that he asked Manchester United if he could wait until the end of the season to join the club – only to be told it was “now or never”.