Fred Sears has pledged to keep improving after signing a new five-year contract at West Ham.
The England Under-19 international made his debut for the club in March, when he scored the winning goal in a 2-1 victory against Blackburn.
The highly-rated academy product has made 10 Premier League appearances this season, seven of those coming from the bench, although he is yet to find the target.
''I am obviously delighted to have signed for another five years with West Ham,'' Sears said.
''I am looking forward to concentrating on football now and getting ready for the next game that is coming up.
''It's nice to know the club wants you here, for that long as well. I am enjoying my football and all that I have been doing and hopefully I can now show there is more to come.''
He added: ''Obviously I am learning every day, I am 19 today and just trying to get better all the time and see how far I can go.''
West Ham chief executive Scott Duxbury said the deal underlined the club's commitment to young talent.
''Freddie Sears signing a new long-term contract is great news for everyone at the club,'' he said. ''He has more than impressed since scoring on his Premier League debut last season
''Our philosophy is very much about developing home-grown players in the academy and then integrating them into the first team.
''Freddie has achieved that and we are looking forward to him playing his part in a bright future for West Ham United.''