Dominic Solanke and Lewis Cook have been added to Gareth Southgate's England squad ahead of Tuesday's friendly international against Brazil.
The pair will join goalkeeper Angus Gunn who was called up on Friday as a replacement for Jack Butland.
The trio played in Friday's U21 international against Ukraine in Kiev, and have returned to England to join the senior squad on Saturday evening.
Liverpool's Solanke and Bournemouth midfielder Cook were both members of England's U20 squad, which earlier this year were crowned world champions at their age group level.
"It's been pleasing to see Angus now playing regular first-team football (at Norwich), it's his first season doing that," said Southgate.
"We didn't want to call in a more senior keeper this time given that we're only a few days and we thought it's a good opportunity for Angus to get the experience.
"With Dom and Lewis, we're talking about a reward really for one captaining the U20 World Cup winners and the other one the Golden Boot winner.
"Both have won at European under-17 level as well so their pedigree is good and we're looking forward to integrating them into the seniors."
Striker Solanke has appeared in seven Premier League games this season, while Cook has played in four for the Cherries.
Cook was England's skipper when they lifted the U20 World Cup in Korea, five months ago.
Cook tweeted on Saturday: "Incredibly honoured and proud to be called up for England senior squad. Huge achievement for me and my family."
As for Gunn, he is currently on loan at Norwich City from Manchester City, and has represented England at five different age-group levels.
Meanwhile, Phil Jones has been ruled out of the game against Brazil at Wembley after being substituted during the first half of the match with Germany due to a thigh injury.
Updated England squad for Brazil: Tammy Abraham, Ryan Bertrand, Gary Cahill, Lewis Cook, Jack Cork, Eric Dier, Joe Gomez, Angus Gunn, Joe Hart, Michael Keane, Jesse Lingard, Jake Livermore, Ruben Loftus-Cheek, Harry Maguire, Jordan Pickford, Marcus Rashford, Danny Rose, Dominic Solanke, John Stones, Kieran Trippier, Jamie Vardy, Kyle Walker, Ashley Young.