is a German professional footballer who plays as a forward for Major League Soccer club LA Galaxy.

Reus spent his youth career at Borussia Dortmund, prior to leaving for Rot Weiss Ahlen. He joined Borussia Mönchengladbach in 2009, and had his most successful season at the club in 2012, scoring 18 goals and providing 12 assists in the Bundesliga to help Borussia Mönchengladbach secure a place in the following season's UEFA Champions League.

Reus returned to his hometown club and back-to-back Bundesliga winners Borussia Dortmund after the 2011–12 season. With the club, Reus won the DFB-Pokal in 2017 and 2021, the DFL-Supercup in 2013 and 2019, and reached the Champions League final in 2013 and 2024, coming in both his first and last season as a member of the side. He also finished Bundesliga runner-up seven times during his twelve-year stint, and served as club captain from 2018 until 2023. Reus scored 170 goals with 132 assists for Borussia Dortmund across all competitions, and he is one of only three players (after Andreas Möller and Thomas Müller) to reach the landmark of 100 Bundesliga goals and 100 assists each. He was voted German Footballer of the Year twice, as well as Bundesliga Player of the Season on three occasions. With more than 200 goals scored throughout his career, Reus is considered one of the most efficient midfielders of this century, and one of Borussia Dortmund's best ever players.

After his contract at Dortmund expired at the end of the 2023–24 season, Reus signed for Major League Soccer side LA Galaxy in August 2024 on a deal until the end of 2026, leaving Dortmund after twelve years, as well as Germany for the first time in his career. Four months after signing for the Galaxy, Reus lifted the MLS Cup, his first trophy with the club.

Reus earned 48 caps for the Germany national team. He represented them at two major tournaments (Euro 2012 and the 2018 World Cup), but also missed three World Cups (2010, 2014, 2022) and two Euros (2016, 2020) due to physical reasons.