Max Lowe, Charles Vernam and Jack Tuite will be among the professional ranks at Derby County next season.
The trio are set to step up from the club's academy to Lee Glover's Under-21 squad for the 2015-16 campaign.
England Under-18 international Lowe can play at left-back or in midfield, Vernam is a striker and defender Tuite has represented the Republic of Ireland at youth level.
They will join midfielder Callum Guy and striker Offrande Zanzala in the U21s, as they both signed professional terms earlier this year.
