Red Star Belgrade

Fudbalski klub Crvena zvezda (Serbian Cyrillic: Фудбалски клуб Црвена звезда, lit. 'Red Star Football Club'), better known simply as Crvena zvezda (Serbian Cyrillic: Црвена звезда) or, in English, as Red Star Belgrade, is a Serbian professional football club based in Belgrade, and a major part of the Red Star multi-sport club.

They are the most successful club from the Balkans and Southeast Europe, being the only club to win both the European Cup and Intercontinental Cup, having done so in 1991, and only the second team from Eastern Europe to win the European Cup. With 32 national championships, 25 national cups, 2 national supercups and one league cup between Serbian and Yugoslav competitions, Red Star was the most successful club in Yugoslavia and finished first in the Yugoslav First League all-time table, and is the most successful club in Serbia. Since the 1991–92 season, Red Star's best results were reaching the UEFA Champions League group stage, the UEFA Europa League round of 16 and the UEFA Cup Winners' Cup round of 16.

According to 2008 polls, Red Star Belgrade is the most popular football club in Serbia, with 48% of the population supporting them. They have many supporters in other former Yugoslav republics and in the Serbian diaspora.

According to the International Federation of Football History & Statistics' list of the Top 200 European clubs of the 20th century, Red Star is the highest-ranked Serbian and Balkans club, sharing the 27th position on the list with Dutch club Feyenoord.