The 19-year-old was instrumental in his team’s title run, but a 2-2 draw with Mainz on the penultimate day of the campaign cost them the championship to Bayern Munich.
In 31 league games this season, he scored eight goals and contributed five assists as Dortmund finished second.
Bellingham remarked, “My responsibility has grown every year I’ve played at the club.
“I must continue to cover every inch of the field, do everything in my power to contribute both forward and backward, and strive to influence games and rule the midfield”.
“My teammates, coaches, and staff have all assisted me in growing. I was a talented young man when I joined the club, but I’ve added things to my game that have elevated it, and I believe that’s mostly down to them“.
Bellingham is rumored to sign a contract with Real Madrid worth more than 100 million euros this summer.
Bellingham joined Borussia Dortmund from Birmingham City in 2020 and has featured 130 times for the German club.
Bellingham has also won 24 caps for England scoring one goal.