Both academy graduates will remain at Old Trafford until at least June 2020 with the option of a further year.
Jose Mourinho has replaced Louis van Gaal at Manchester United.
Zlatan Ibrahimovic looks set to complete Old Trafford switch, but what other deals could be in the pipeline?
Marcus Rashford and Borthwick-Jackson were handed first team debut by Louis van Gaal.
Outspoken manager joins Old Trafford club after months of speculation.
Memphis Depay's future is one of the issues Mourinho must contend with.
Two-time Champions League winner returns to management five months after leaving Chelsea for a second time.
The former Red Devils star thinks his countryman can bring the good times back to United.
Michael Carrick is out of contract at Manchester United on 30 June and is hoping to extend his stay at Old Trafford.
Hoek followed van Gaal from the Dutch national side to United in 2014.
Manchester United are looking to help Jose Mourinho in bringing the players he wants to Old Trafford.
City and Barca to table bids for Everton centre-back before start of Euro 2016, reports say.
Mourinho's agent, Jorge Mendes, will continue talks with Ed Woodward today (25 May).
Ronald de Boer believes similarities between Van Gaal and Mourinho could lead to another rebellion.
IBTimes UK looks at the best quotes from incoming Manchester United manager Jose Mourinho
The 34-year-old midfielder's contract with the Red Devils expires in June.
Van Gaal was sacked after Manchester United failed to mount a title challenge and qualify for Champions League.
Zlatan Ibrahimovic has played under Jose Mourinho when both were at Inter Milan.
IBTimes UK analyses the issues that cost 64-year-old his job at Old Trafford, despite FA Cup success.
Dutchman relieved of his post two days after guiding United to their first FA Cup success for 12 years.
Old Trafford club pigeon-holed into hiring Portuguese coach who will provide success over security.
Mata tells United fans he wants to "share more good moments" with them next season.