Ronaldo scored twice as Real Madrid put Juventus to the sword with a 4-1 win at the Millennium Stadium in Cardiff.
Casemiro and Marco Asensio also struck to ensure Zinedine Zidane's side become the first team to retain the trophy in its modern format.
Ronaldo's career came full circle last night, with his brilliant brace coming 13 years after he scored on the same ground for Manchester United as a teenager against Millwall.
In the time since he has established himself as one of the greats of the game – regularly vying with Barcelona's Lionel Messi for the individual awards on offer.
And, speaking after Real lifted the trophy for the third time in four years, the 32-year-old aimed a dig at Messi by hammering home the fact he had beaten the Barcelona star to finish as the tournament's top scorer.
Real Madrid's Champions League player ratings against Juventus Sat, June 3, 2017
Express Sport brings you Real Madrid's player ratings from the Champions League final against Juventus
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Keylor Navas – 7.0
Real Madrid star Cristiano Ronaldo has hit back at criticism over his form
"I scored two goals, I am the top scorer in the Champions League again," he said.
"The objective is to win next season's Champions League, it is not easy, but nothing is impossible.
"The people who always criticise Cristiano are going to have put their guitar back in its case.'
"I have finished the season well. I am very happy as we are the first team to win two consecutive Champions Leagues, and scoring two goals.
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"The double is another record for all these players, who deserve it."
Real fans booed Ronaldo prior to their quarter-final clash with Bayern Munich in April.
Cristiano Ronaldo has now won the Champions League three times with Real Madrid
But the Portugal international has been irresistible since, scoring 16 goals in his last 10 games across all competitions.
Speaking earlier this week, he admitted that he was annoyed at how not all Madrid supporters give him the respect he feels he deserves.
"I don’t like it and it’s not normal that they whistle you in your own stadium. I just don’t like it," he said.
"It shouldn’t be the case that a player who always wants to give his best and give 100 percent for this team when he makes his first mistake people whistle.
"It’s not correct. And when you are on a difficult run that is when you need extra support from outside not less. Sometimes we don’t have it."