McCarthy said: “I have always dreamed about playing for United.
“They are the most popular team in my country – and Real Madrid, Barcelona, Juventus and AC Milan are nothing in comparison.
“With the attackers that United have, I don’t think I have much chance of moving to Old Trafford.
“But I want to see myself playing for the best and you must have ambition because without it, players are nothing.
“That’s not being disrespectful to Blackburn because it is a very good club and the management, players and fans have all made me feel very welcome.
“At the moment, my ambition is to make Blackburn a big force in the Premiership and win the FA Cup – but I am a dreamer.”
