Jack Lahne

Brommapojkarna

Jack made his senior debut for Brommapojkarna at the age of 15 in a Svenska Cupen game against Norrköping in March 2017. Lahne made his Superettan debut for Brommapojkarna during Summer 2017. He scored his first goal for Brommapojkarna in a Superettan game against Åtvidaberg in July 2017, making him Brommapojkarna's youngest ever goalscorer at the age of 15 years and 271 days. At the end of the 2017 Superettan season, Brommapojkarna won promotion to Allsvenskan. During the 2018 Allsvenskan season, Jack Lahne scored 4 goals in 19 games as Brommapojkarna were relegated back to Superettan after losing in the relegation playoffs against AFC Eskilstuna, in which Lahne scored one goal.

Amiens

In January 2019, Lahne joined Amiens on loan until the end of the 2018–19 Ligue 1 season. On deadline day, 4 April 2019, however, the loan deal was converted to a permanent transfer, before Lahne had had the chance to play for Amiens. Lahne scored his first Ligue 1 goal for Amiens in a game against Montpellier on 30 November 2019, which was also his debut.

Loan to AIK

On 4 April 2019, the same day SC Amiens purchased Lahne, it was announced the club had agreed to loan Lahne to reigning Allsvenskan champions AIK until 31 July 2019. Lahne made his Allsvenskan debut for AIK on 8 April 2019, coming on as a substitute for Saku Ylätupa in a 0–0 draw against IFK Norrköping. On 14 April 2019 in an Allsvenskan game against IK Sirius, Lahne scored his first…

Lahne has made a total of 30 appearances for the Sweden U17 and U19 teams. He was called up to the Zambia national team for a set of friendlies in November 2025. On 10 December 2025, Lahne was called up to the Zambia squad for the 2025 Africa Cup of Nations.

As of 28 July 2022

Lahne was adopted to Sweden from Zambia at an early age.