Ireland head coach Andy Farrell has named four uncapped players in a 42-man training squad ahead of the Rugby World Cup.
Munster wing Calvin Nash, Leinster backs Ciaran Frawley and Jamie Osborne and Ulster hooker Tom Stewart have all been included.
Leinster back Jordan Larmour and Munster fly-half Joey Carbery miss out, though, for a first block of training that starts on June 18.
Ireland have World Cup warm-up games against Italy, England and Samoa in August, with their tournament opener coming against Romania in Bordeaux on September 9.
A warm-weather training camp in Portugal is also planned for August before Farrell confirms his 33-player World Cup squad.
“It is exciting to announce our extended training squad for the first phase of Rugby World Cup preparations, and we are looking forward to assembling in Dublin next month to hit the ground running as a group,” Farrell told irishrugby.ie.
“It is pleasing to see that selection has been as tough as ever, as real quality players have initially been unfortunate to have missed out.
“I am sure that camp will be competitive enough as we grow minds and bodies and look to push on with our game from last season.
“In the meantime, it’s important that we freshen up for a busy and exciting summer ahead so we are ready to get to work on June 18.”
Training squad: Backs – B Aki (Connacht), C Blade (Connacht), R Byrne (Leinster), C Casey (Munster), J Crowley (Munster), K Earls (Munster), C Frawley (Leinster), J Gibson-Park (Leinster), M Hansen (Connacht), R Henshaw (Leinster), H Keenan (Leinster), J Lowe (Leinster), S McCloskey (Ulster), C Murray (Munster), C Nash (Munster), J O’Brien (Leinster), J Osborne (Leinster), G Ringrose (Leinster), J Sexton (Leinster), J Stockdale (Ulster).
Forwards – R Baird (Leinster), F Bealham (Connacht), T Beirne (Munster), J Conan (Leinster), G Coombes (Munster), C Doris (Leinster), T Furlong (Leinster), C Healy (Leinster), I Henderson (Ulster), R Herring (Ulster), R Kelleher (Leinster), D Kilcoyne (Munster), J McCarthy (Leinster), P O’Mahony (Munster), T O’Toole (Ulster), A Porter (Leinster), C Prendergast (Connacht), J Ryan (Leinster), D Sheehan (Leinster), T Stewart (Ulster), K Treadwell (Ulster), J van der Flier (Leinster).