Leeds United director of football Victor Orta has described Jack Harrison as a huge player in their squad.
The winger has earned a contract extension with the club, after he was nearly sold to Leicester City in January.
Thriving under new boss Javi Gracia, Harrison will be hoping to fire the club to safety from relegation.
"Jack is a crucial part of our squad and our plans going forward and I'm really happy he has agreed to commit his long-term future to the club," Orta said.
"He is one of the most professional players I have come across in my career.
“He has an unbelievable attitude and only wants to continue improving and I know we will see him at the peak over the duration of the next five years."