West Ham have signed England U19 international Nathan Holland from Everton on a three-and-a-half-year contract.
The 18-year-old signed his first professional deal at Goodison Park in January 2016 but did not make a first-team appearance for the Toffees.
Holland represented the national team at U17 level at the European Championships in 2015 and made his U19 debut last September.
He has been included in the West Ham U23 squad which will play against Leicester on Monday evening.