Troy Parrott, Lee O'Connor and Jack Byrne will all start for the Republic of Ireland in Thursday's friendly against New Zealand, Mick McCarthy confirmed this morning.
Parrott and O'Connor, who are on the books at Spurs and Celtic respectively, have caught the eye for Stephen Kenny's Under21 side, the former scoring twice in the 3-1 away win over Sweden and the latter being one of Ireland's stronger performers in the 0-0 draw with Italy in Tallaght Stadium last month.
The 17-year-old Parrott made his senior debut up front for Tottenham Hotspur in this EFL Cup tie against Colchester United and has been an enormously prolific goalscorer for the club's youth sides.
The Waterford-born O'Connor joined Celtic from Manchester United in September on a four-year deal.
It is the first time either has been included in a senior squad and both will make their debuts on Thursday.
Jack Byrne, meanwhile, will make his first start for Ireland, according to McCarthy.
The Shamrock Rovers midfielder was introduced midway through the second half of Ireland's 3-1 friendly win over Bulgaria last month.
The Hoops playmaker was named 2019 PFAI Player of the Year on Sunday.