Lucas Simon Pierre Tousart (born 29 April 1997) is a French professional footballer who plays as a midfielder for Bundesliga club Union Berlin.

[3] Tousart made his Lyon debut on 5 December 2015 in a Ligue 1 match against Angers.

[5] On 27 January 2020, Tousart signed with Bundesliga side Hertha BSC.

[8][9] On 19 July 2023, Tousart joined Hertha BSC's local rivals Union Berlin.

[10] On 16 September 2023, he made his debut for the club in a 1–2 away loss to VfL Wolfsburg, coming on as a substitute in the second half.