Speaking to the club’s matchday programme, the midfielder claimed that he has always been a Celtic fan and that he always wanted to play for the Hoops.
The 28-year-old also revealed that his family are Celtic fans as well and they used to travel to the derbies against Rangers together.
McCarthy hailed the atmosphere during the Celtic – Rangers games and he also revealed his admiration for the Crystal Palace fans.
He also revealed how he used to own the Celtic strips over the years.
It will be interesting to see if McCarthy gets to play for Celtic in the future.