Ronaldo, who joined Real from Manchester United in 2008 for a then world record £80 million, is the Spanish club's all-time top scorer with 451 goals in all competitions and won two La Liga titles and four Champions League trophies with them.
Kane asks Spurs to consider bid, United ready with £90m offer - Paper Round
Social media erupted with the monstrous news with fans both stunned, amazed and specifically quite shocked that it has all been so seemingly random and low key - and during the World Cup.
Real Madrid fans were among those ready to now at least hail him as the club's greatest player of all-time.
Ronaldo return to Real Madrid 'impossible' but Man Utd a possibility - report
United and West Ham battle for Max Aarons - Paper Round