Bentley is already part of the senior England squad that face Brazil in a friendly this Friday and then Estonia on Wednesday, 6th June in a Euro 2008 qualifier.
The Rovers winger will join up with the U21 squad after the match in Estonia.
England U21 squad: Alnwick (Tottenham), Carson (Liverpool), Hart (Man City); Baines (Wigan), Cahill (Aston Villa), Ferdinand (West Ham), Hoyte (Arsenal), Onuoha (Man City), Rosenior (Fulham), Taylor (Newcastle), Whittingham (Cardiff); Bentley (Blackburn), Huddlestone (Tottenham), Milner (Newcastle), Noble (West Ham), Reo-Coker (West Ham), Richardson (Man Utd), Routledge (Tottenham); Derbyshire (Blackburn), Lita (Reading), Nugent (Preston), Vaughan (Everton), Young (Aston Villa).