Magnus Nordengen Knudsen (born 15 June 2001) is a Norwegian professional footballer who plays as a midfielder for German Bundesliga club Holstein Kiel.

[2] On 23 December 2021, Rostov announced the signing of Knudsen from Lillestrøm with a 4.5-year contract.

[3] On 24 March 2022, he returned to Lillestrøm on loan until 30 June 2022.

[5] On 29 June 2023, Knudsen moved to AGF in Denmark on a one-year deal.

[6] On 14 June 2024, he signed a contract with Holstein Kiel in Germany.