“On Monday, I was delighted to sign a new contract until 2018, which was great,” the 19-year-old wrote on West Ham’s official website last week.
“West Ham is my club and I want to be here for as long as possible, so to have this security means I can concentrate 100 per cent on my football and not worry where I will be playing for the next few seasons.”
Cullen is a talented midfielder who is only 19 years of age, but he has already made his Premier League debut for West Ham.
The youngster played the final seven minutes of the Hammers’ Premier League game against Liverpool away from home before the international break.
It was a memorable debut for the teenager, as Slaven Bilic’s side got the better of the Reds 3-0 at Anfield.
It is unlikely that Cullen will get to play regularly for the West Ham first team this campaign, but he could be given chances from time to time as the season progresses.
Having signed a new long-term contract with the Hammers, the Republic of Ireland Under-21 international can focus on doing well for the club’s youth team and impressing Bilic whenever he gets the chance to feature for the senior side.