Jack Daniel Kalichi Lahne (; born 24 October 2001) is a Swedish professional footballer who plays as striker for Norwegian First Division club Start, on loan from club Amiens. Club career 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 Åtvidabergs 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 goal for AIK in a 2–1 win. On 1 July 2019, Amiens exercised their option to end Lahne's loan deal with AIK prematurely. Loan to Örebro On 28 February 2020, Lahne joined Örebro SK on loan until the summer of 2020. He made his competitive debut for Örebro in a 2019–20 Svenska Cupen game against IF Elfsborg in February 2020. He played in 10 Allsvenskan games without scoring before returning to Amiens on 31 July 2020. Loan to Häcken On 4 March 2021, Lahne joined Häcken on loan for the 2021 Allsvenskan season. Loan to Újpest On 28 July 2022, Lahne signed for Hungarian club Újpest on loan. Loan to Start In February 2023, Lahne signed