Carl Marcus Christer Antonsson (born 8 May 1991) is a Swedish professional footballer who plays as a striker for A-League club Western Sydney Wanderers.

[4] On 7 August 2016, he made his competitive debut for the club as a second-half substitute in place of Matt Grimes, during a 3–0 defeat to Queens Park Rangers.

[7] On 26 October, he scored his third of the season for Leeds in their win against Norwich City in the English League Cup; a dramatic penalty shootout victory after a 2–2 draw in extra time.

[11] He found his position changed, being played as a left-sided forward or winger and in November he scored five goals in as many games, going on to win the PFA Player of the Month award for League One.

[15] On 14 July 2018, Antonsson joined Allsvenskan side Malmö FF on a three-year contract for an undisclosed fee from Leeds United after being signed by manager Uwe Rösler.

[19] After 6 goals in 16 games for Al-Adalah, it was announced that Antonsson had signed for Australian A-League Men club Western Sydney Wanderers on a two-year contract.