Bournemouth have signed midfielder Alex Scott from Bristol City and defender Max Aarons from Norwich City.
Scott, 19, played three matches for England at the U20 World Cup in Argentina earlier this year and has joined for a reported fee of £25m.
Right-back Aarons, 23, recently helped England win the European Under-21 Championship and has cost £7m.
Both have signed long-term contracts and take manager Andoni Iraola's number of summer signings to six.
"Alex is one of the most exciting young players in Europe," Bournemouth chief executive Neill Blake said.
Scott trained with the youth teams of Bournemouth and Southampton before he played non-league football for Guernsey, with the Channel Islands his birthplace.