FK Crvena zvezda, also known as Red Star Belgrade, is a professional football club based in Belgrade, Serbia. Founded in 1945, the club has a rich history and is one of the most successful teams in Serbian football. They compete in the Serbian SuperLiga and have won numerous national championships and cups. The club is also known for its passionate fan base, called Delije, who support the team at home and away matches. FK Crvena zvezda has a notable international presence, having won the prestigious European Cup in 1991, making it a significant player in European football history.