The 17-year-old moved from England to Germany this past summer, as Sancho did in 2017.
And Bellingham says the former Manchester City man has been very supportive after his move.
"Sancho is really very important to me. Not just because he comes from the same country as me or because he speaks the same language. Even more important is how he puts his arm around me, but also around the other young players...how he strengthens us in our abilities, gives us confidence," Bellingham told Kicker.
"He's a great role model for English players my age. To get praise and encouragement from him means a lot to me. That helps me a lot."