Williot Theo Swedberg (born 1 February 2004) is a Swedish professional footballer who plays as a left winger or attacking midfielder for La Liga club Celta Vigo and the Sweden national team.

[9] In 2020, Swedberg was sent on loan to Hammarby's affiliated club IK Frej in Ettan, the domestic third tier, where he made his debut in senior football.

[21] On 23 February 2022, Swedberg was close to join Lokomotiv Moscow for a reported fee of around €4.5 million, but the deal ultimately fell through due to administrative reasons and the political instability following Russia's invasion of Ukraine.

[22] He had a strong start to the 2022 season, scoring five goals in the first five league fixtures, awarding him Allsvenskan Player of the Month in April.

[23] Swedberg featured in the final of the 2021–22 Svenska Cupen, in which Hammarby lost by 3–4 on penalties to Malmö FF after the game ended in a 0–0 draw.