Timothy Castagne (French pronunciation: [timɔti kastaɲ]; born 5 December 1995) is a Belgian professional footballer who plays as a full-back for Premier League club Fulham and the Belgium national team.

[3] He practised with the youth teams of Standard Liège after going to a boarding school in the area, but continued to play matches at Virton at the weekend.

[6] He made his Belgian Pro League debut under new head coach Alex McLeish on 14 September 2014 as a starter against Club Brugge.

[15] Alternating with Hans Hateboer on the right wing-back, he scored 4 goals in the league overall; the others came in the second leg against Roma,[16] and in two important end-of-season victories against Lazio (1–3),[17] and Genoa (2–1).

[25] On 29 August 2023, following Leicester's relegation to the Championship the previous season, Premier League side Fulham announced the signing of Castagne on a four-year contract, with an option for a further year, for an undisclosed fee,[26] reported to be around £15 million.

[29] On 22 March 2019, he provided an assist for his now Leicester team mate Youri Tielemans in a 3–1 win against Russia in the UEFA Euro 2020 qualifiers.