Luca Jannis Kilian (born 1 September 1999) is a German professional footballer who plays as a defender for 2.Bundesliga club 1.

Kilian joined the youth academy of Borussia Dortmund at the age of 11 from his local club Hombruch.

[3] He made his professional debut with Paderbon in a 3–2 Bundesliga loss to FC Bayern Munich on 28 September 2019.

[4] On 10 August 2020, Kilian signed for Bundesliga club Mainz 05, on a four-year deal.

[6] He joined the club on a permanent basis for a fee of €2 Million in July 2022.