Ruud Gullit (Dutch pronunciation: [ˈryt ˈxʏlɪt] ^ⓘ; born Rudi Dil; 1 September 1962) is a Dutch former footballer and subsequent manager. He was noted for his ability to play in multiple positions.

At club level, Gullit moved from PSV to AC Milan in 1987 for a world record transfer fee. Nicknamed "The Black Tulip", he was part of a notable Dutch trio at AC Milan which included Marco van Basten and Frank Rijkaard. Gullit won three Serie A titles and two European Cups with Milan. In 1995, he signed for Chelsea and was appointed the club's player-manager a year later. In his debut season, he led Chelsea to FA Cup success, the club's first major title for 26 years, and in doing so, became the first overseas manager to win the FA Cup.

Gullit captained the Netherlands national team that was victorious at the UEFA Euro 1988 and was also a member of the squad for the 1990 FIFA World Cup and Euro 1992. He won the Ballon d'Or in 1987 and was named the World Soccer Player of the Year in 1987 and 1989. In 2004, he was named one of the Top 125 greatest living footballers as part of FIFA's 100th anniversary celebration.

Gullit was born as Rudi Dil in Amsterdam to George Gullit, a Surinamese who arrived in the Netherlands with Herman Rijkaard (father of Frank Rijkaard), and Dutch mistress Ria Dil from the Jordaan district of Amsterdam. The Gullit family lived in one split level room on the top floor of a small apartment building. Gullit's father worked as an economics teacher at a local school, his mother as a custodian at the Rijksmuseum.

Gullit developed his football skills in the confines of the Rozendwarsstraat, and street football was instrumental in his formative years. Gullit's first team were the Meerboys, where he joined as a junior in 1970. At the age of ten, however, Gullit moved from the Jordaan to Amsterdam Old West where he played street football alongside Rijkaard. Gullit joined the DWS club after his move, and came to the attention of the Dutch youth team, where he played alongside future full international teammates, Erwin Koeman, Ronald Koeman and Wim Kieft.

It was during his time at DWS that Gullit first took to using his father's surname, rather than his registered surname (from his mother), as he thought Gullit sounded more like a football player.

On 22 September 1978, Gullit signed professionally for HFC Haarlem under coach and former West Bromwich Albion player Barry Hughes. Gullit made 91 league appearances for Haarlem, scoring 32 goals. He made his debut for the club at just 16 years and 11 months old, on 19 August 1979 (Haarlem-MVV Maastricht 2-2), becoming at the time the youngest player in the history of the Eredivisie. In his first year at Haarlem, the club finished bottom of the Eredivisie, but bounced back the following season winning the Eerste Divisie. Gullit was named as the best player in the Eerste Divisie that season.

In the 1981–82 season, Gullit was in fine form as Haarlem finished fourth and qualified for Europe for the only time in their history. In that same season, Gullit scored the goal he would later consider his finest: "Playing against Utrecht I went past four defenders and then the goalkeeper, and scored. It was an unforgettable goal for me." Hughes was so impressed with the young Gullit that he described him as the "Dutch Duncan Edwards".