Thelonious "Thelo" Gerard Aasgaard (born 2 May 2002) is a professional footballer who plays as a midfielder for EFL League One club Wigan Athletic. Born in Liverpool, England, he has represented Norway at under-16 and under-20 level internationally.

Aasgaard joined the youth academy of Wigan Athletic in 2016,^[3] having previously been a part of the youth set-up at Liverpool. As a result of Wigan being put into administration in the 2019/20 season, and the team's subsequent relegation from the Championship, Aasgaard became part of the Wigan first-team squad for their 2020/21 League One campaign at the age of 18.

Aasgaard made his professional debut with Wigan in a 1–0 EFL League One loss at home to Peterborough United on 20 October 2020.^[4] He scored his first goal for Wigan in a 2–1 defeat against Oxford United on 21 November 2020.^[5] Aasgaard ended his first season having played 35 times in all competitions, including 13 league starts, scoring 3 goals.^[6]

In January 2021, Aasgaard signed his first professional contract with Wigan, signing until the summer of 2023.^[7]

After a solid start to the 2021/22 season, Aasgaard signed an improved four-and-a-half year contract, running until June 2026.^[8]

Aasgaard was born in Liverpool, England, and is of Norwegian descent through his father, and of French descent through his mother.^[9]

He represented the Norway under-16 team three times in 2018.^[10]

In August 2021, Aasgaard was called up to the Norway under-20 team for the first time, and made his debut on the right of midfield in their 1–1 draw with Germany under-20 on 6 September 2021.^[11]

As of match played 22 April 2023