Stuart Armstrong (born 30 March 1992) is a Scottish professional footballer who plays as a midfielder for EFL Championship club Sheffield Wednesday and the Scotland national team.

Armstrong moved to Celtic in February 2015, and helped them win four Scottish league championships and consecutive domestic trebles.

Born in Inverness, Armstrong attended Hazlehead Academy in Aberdeen,[3] alongside fellow footballer Fraser Fyvie.

[5] Armstrong played for Dyce Boys Club and the Inverness Caledonian Thistle youth team, before signing professionally with Dundee United in July 2009.

[6][7] Armstrong made his first team debut for Dundee United in November 2010, coming on as a substitute in a 1–0 win over Hamilton Academical.

[10] After the match, Armstrong said that "I got a deflected goal in Inverness last month but my first proper strike came against St Mirren in the 2–2 draw last week and that has filled me with confidence".

[13][14] Having made six appearances in February, Armstrong was awarded Clydesdale Bank Premier League Young Player of the Month.

[24] His last match for Dundee United came in a New Firm derby defeat of Aberdeen in a 2014–15 Scottish League Cup semi-final on 31 January 2015.

[25] Armstrong made 150 appearances, starting 109 matches, and scored 22 goals in all competitions for Dundee United before joining Celtic.

[31] Armstrong made his Celtic Park and European debut in a 3–3 draw with Inter Milan in the UEFA Europa League on 19 February 2015.

[32][33] Armstrong made his first appearance of the 2015–16 season in the UEFA Champions League second qualifying round first leg tie against Stjarnan, assisting the second goal in a 2–0 home win.

[62] He made his Whitecaps debut in a 0–0 draw with FC Dallas on 7 September,[63] and scored his first goal a week later in a 2–0 victory against San Jose Earthquakes.

[39] In October 2020 he pulled out of the Scotland squad for a UEFA Euro 2020 qualifying play-off semi-final against Israel after testing positive for COVID-19.

[76] He played in all three of the team's Group D matches, starting against both Czechia[77] and Croatia[78] at Hampden Park and appearing as a substitute against England at Wembley Stadium.

[81] He made one appearance at the tournament, coming on as a 76th minute substitute for John McGinn against Hungary as Scotland finished bottom of Group A with one point from three matches.