Vinícius José Paixão de Oliveira Júnior, commonly known as Vinícius Júnior or Vini Jr., is a Brazilian professional footballer who plays as a forward for La Liga club Real Madrid and the Brazil national team. Considered one of the best players in the world, he is known for his pace, technique and dribbling ability.

His footballing career began in 2006, when his father took him to the branch offices of Flamengo, in the neighborhood of Mutuá, in São Gonçalo where he lived. His club document described him as a left-back.

Hailing from a poor Catholic family, Vinícius went to live in Abolição with his uncle, Ulisses, to shorten the distance to Ninho do Urubu (the "Vultures' Nest"). He started to receive financial aid from Flamengo as well as aid from entrepreneurs.

On 23 May 2017, La Liga club Real Madrid signed a contract to acquire Vinícius, effective after his 18th birthday on 12 July 2018 (as age 18 is the minimum age for international transfer). He transferred for a reported fee of €46 million, which was at the time, the second most expensive sale of a player in the history of Brazilian football (behind only Neymar), the largest amount received by a Brazilian club for a transfer, and the highest amount ever paid by a club for a footballer under the age of 19. He was originally scheduled to return to Brazil on loan in July 2018.

On 30 October 2015, Vinícius was called up for Brazil by coach Guilherme Dalla Déa for the South American U-15 Championship. Vinícius and Brazil won the U-15 title and he was the 2nd top-scorer of the tournament with seven goals. He was named player of the tournament and continued to perform which helped him convince Flamengo to sign him by the age of 16. On 24 June 2016, Vinícius was called up for a friendly against Chile U-17 and scored two goals and provided two assists in the 4–2 victory.

In March 2017, Vinícius debuted in the South American U-17 Championship for Brazil with a goal in a 3–0 victory over Peru. In the final stage, he scored two goals in a 3–0 win over Ecuador and two goals in a 3–0 victory over Colombia, securing Brazil's place in the 2017 FIFA U-17 World Cup in India, where Brazil (without Vinícius) eventually would finish third. After leading Brazil to win the South American U-17 Championship, he was named the tournament's best player and was top goal-scorer with seven goals.

On 28 February 2019, Vinícius was called up to the Brazil national team for the first time for friendlies against Panama and the Czech Republic. However, he suffered an injury while playing for Real Madrid, and David Neres was called up in his place in March. In May, he was excluded from Brazil's final 23-man squad for the 2019 Copa América by manager Tite. The same year on 10 September, he debuted as a 72nd-minute substitute in Brazil's 1–0 defeat against Peru.