The 19-year-old midfielder has been named Noel King's squad for the Republic's forthcoming friendly against the Netherlands in Dublin.
The young Irish side will host their Dutch counterparts at the Tallaght Stadium on February 6, 2013.
Reilly, who has been with Blues since the age of seven, has been a regular starter for Blues over recent weeks. He has made seven first team appearances so far during this campaign and scored his debut goal in the 1-1 draw at Huddersfield.