Cille Nilsen is a 21-year-old professional football player from NOR. He currently plays for Rosenborg BK Women, wearing the number 22 shirt. At the international level, he represents Norway U19 Women. He plays primarily as a Midfield.

Across 11 appearances in the Norwegian Toppserien 2025, Cille Nilsen registered 3 goals and 1 assists, while completing 0 key passes out of 0 total passes with a passing accuracy of -.