Cristiano Ronaldo dos Santos Aveiro born in 5 February 1985, in Funchal, Madeira, Portugal.

At age 16, Ronaldo was promoted from Sporting's youth team by first-team manager László Bölöni, who was impressed with his dribbling. He subsequently became the first player to play for the club's under-16, under-17 and under-18 teams, the B team, and the first team, all within a single season. A year later, on 7 October 2002, Ronaldo made his debut in the Primeira Liga, against Moreirense, and scored two goals in their 3–0 win.

Ronaldo became Manchester United's first-ever Portuguese player when he signed before the 2003–04 season. His transfer fee of £12.24 million made him, at the time, the most expensive teenager in English football history. Although he requested the number 28, his number at Sporting, he received the number 7 shirt, which had previously been worn by such United players as George Best, Eric Cantona and David Beckham.

A Portuguese international, Ronaldo was named the best Portuguese player of all time by the Portuguese Football Federation in 2015. He made his senior debut in 2003 at age 18, and has since earned over 150 caps, including appearing and scoring in eight major tournaments, becoming Portugal's most capped player and his country's all-time top goalscorer. He scored his first international goal at Euro 2004 and helped Portugal reach the final of the competition.

First Champions League title awarded. The 2008 UEFA Champions League Final was a football match that took place on Wednesday, 21 May 2008, at the Luzhniki Stadium in Moscow, Russia, to determine the winner of the 2007–08 UEFA Champions League. It was contested by Manchester United and Chelsea, making it an all-English club final for the first time in the history of the competition.

He subsequently became United's first Ballon d'Or winner since George Best in 1968.

Ahead of the 2009–10 season, Ronaldo joined Real Madrid for a world record transfer fee at the time, of £80 million (€94 million). His contract, which ran until 2015, was worth €11 million per year and contained a €1 billion buy-out clause.

Real Madrid and Portugal winger Cristiano Ronaldo won the Ballon d'Or award as the World Player of the Year. It was his second Ballon d'Or, after winning the award in 2008, as well as his first FIFA Ballon d'Or.

The match took place on Saturday, 24 May 2014, at the Estádio da Luz in Lisbon, Portugal, between Spanish sides Real Madrid and Atlético Madrid. It was the fifth tournament final to feature two teams from the same association, the second all-Spanish final and the first between teams from the same city. Real Madrid won the match 4–1 after extra time, with goals from Gareth Bale, Marcelo and Cristiano Ronaldo following a 93rd-minute header by Sergio Ramos. and this was the 2nd champions league title awarded by Cristiano Ronaldo.

Real Madrid and Portugal forward Cristiano Ronaldo won the FIFA Ballon d'Or as the World Player of the Year for a second consecutive time, having won it previously last year.

It was played at the San Siro stadium in Milan, Italy, on 28 May 2016, between Spanish teams Real Madrid and Atlético Madrid, in a repeat of the 2014 final. It was 3rd Champions League title awarded by Cristiano Ronaldo.

In the final against hosts France, Ronaldo was forced off after just 25 minutes following a challenge from Dimitri Payet, despite multiple treatments and attempts to play on, he was stretchered off the pitch and replaced by Quaresma. During extra time, substitute Eder scored in the 109th minute to earn Portugal a 1–0 victory. As team captain, Ronaldo lifted the trophy in celebration of his country's first triumph in a major tournament. He was awarded the Silver Boot as the joint second-highest goalscorer, with three goals and three assists, and was named to the team of the tournament for the third time in his career.

France Football announced that they would publish a shortlist of 30 players across six announcements with two hour intervals on 24 October 2016. On 12 December 2016, Cristiano Ronaldo won the award by a record margin of 429 points ahead of second-placed Lionel Messi and Antoine Griezmann, who came third.

It was played at the Millennium Stadium in Cardiff, Wales on 3 June 2017, between Italian side Juventus and Spanish side and titleholders Real Madrid, in a repeat of the 1998 final. Real Madrid won the match 4–1 to secure their 12th title in this competition. This was fourth Champions League title awarded by Cristiano Ronaldo.

Cristiano Ronaldo won the award on 7 December 2017 equalling the highest tally of Ballons D'Or in history, sharing the honor with Lionel Messi.

On 20 April, Ronaldo played in the scudetto clinching game against Fiorentina, as Juventus won their eighth successive title after a 2–1 home win, thereby becoming the first player to win league titles in England, Spain, and Italy.

Madrid wins Champions League 2018. to make Ronaldo the most Player won the UCL of all time by 5 times, in 2008, 2014, 2016, 2017, 2018.

On 30 June, Portugal was eliminated following a 2–1 defeat to Uruguay in the last 16. For his performances in the tournament, Ronaldo was named in the World Cup Dream Team.

After eight days of transfer speculation concerning Italian club Juventus, on 10 July 2018, Ronaldo signed a four-year contract with them after completing a €100 million transfer, which included an additional €12 million in other fees and solidarity contributions to Ronaldo's youth clubs. The transfer was the highest ever for a player over 30 years old, and the highest ever paid by an Italian club.

On 18 August, Ronaldo made his debut in a 3–2 away win against Chievo Verona.

On 16 September, Ronaldo scored his first two goals for Juventus in his fourth appearance in a 2–1 home win over Sassuolo in Serie A; his second was the 400th league goal of his career.

On 19 September, in his first Champions League match for Juventus, he was sent off in the 29th minute for "violent conduct", his first red card in 154 tournament appearances.

After placing second in both the 2018 UEFA Men's Player of the Year and 2018 The Best FIFA Men's Player for the first time in three years, behind Luka Modrić, Ronaldo performances in 2018 also saw him voted runner-up for the 2018 Ballon d'Or, finishing once again behind his former Real Madrid teammate.

Ronaldo won his first trophy with the club on 16 January 2019, the 2018 Supercoppa Italiana, after he scored the only goal from a header against AC Milan.

The 2019 UEFA Nations League Final was a football match that determined the winners of the final tournament of the 2018–19 UEFA Nations League. It was the inaugural final of the international football competition involving the men's national teams of the member associations of UEFA. The match was held on 9 June 2019 at the Estádio do Dragão in Porto, Portugal, and was contested by hosts Portugal and the Netherlands. Portugal won the final 1–0 to become the first champions of the UEFA Nations League. Guedes has scored the goal in the 60th min.

On 8 September 2020, Ronaldo scored his 100th and 101st international goals in a 2–0 away win over Sweden in a 2020–21 UEFA Nations League match, becoming only the second male player ever to achieve this milestone (after Ali Daei of Iran) and the first in Europe.

On 13 October, the FPF announced that Ronaldo tested positive for COVID-19 while being asymptomatic. By 30 October, Ronaldo had recovered.

On 27 August 2021, Manchester United announced they had reached an agreement with Juventus to re-sign Ronaldo, subject to agreement of personal terms, visa, and medical. The transfer was reported as costing an initial £12.85 million, with a two-year contract plus an optional year, and was confirmed on 31 August.

On 11 September, Ronaldo made his second debut at Old Trafford, scoring the opening two goals in a 4–1 league victory against Newcastle United.

On 2 December, Ronaldo scored twice in a 3–2 home win against Arsenal in the Premier League, becoming the first player to score more than 800 top-level career goals.