The Frenchman's Los Blancos move was confirmed on Monday, leading Cristiano Ronaldo to send a lovely message to the 2018 FIFA World Cup winner.

Football's worst-kept secret was finally announced on Monday. Kylian Mbappe, the French sensation on Real Madrid's radar for years, has completed his move to Santiago Bernabeu.

The UEFA Champions League winners made the announcement just days after beating Dortmund at Wembley to win their 15th European Cup. The former PSG ace joins Los Blancos on a five-year deal, thus bringing an end to this extended transfer saga.

And to top things off, the 25-year-old received a touching congratulatory message from his icon upon completing this dream move. None other than Cristiano Ronaldo, Real Madrid's all-time top scorer, took to Instagram to welcome the 2018 FIFA World Cup winner to the Spanish capital.

"My turn to watch. Excited to see you light up the Bernabeu," the five-time Ballon d'Or winner commented on Mbappe's post announcing this move.

Mbappe was also ecstatic to join the UEFA Champions League holders. The Frenchman took to social media to express this emotion, posting pictures of himself when he was young alongside Cristiano and in a Real Madrid jersey.

"A dream come true," PSG's all-time top scorer wrote on X (formerly Twitter). "[I'm] So happy and proud to join the club of my dreams Real Madrid. Nobody can understand how excited I am right now.  "Can't wait to see you, Madridistas, and thanks for your unbelievable support."

Kylian joins after running down his contract at PSG, thus joining Real Madrid for free. The World Cup winner has signed a five-year deal and while Los Blancos have not paid a transfer fee to his former Ligue 1 employers, the goalscoring machine has reportedly received a huge signing on fee.

According to ESPN, that figure is worth a whopping €150M spread over the extent of his contract, which runs until 2029. Additionally, the player will receive €15M ($16.2M) per year in wages after taxes, thus helping Real Madrid to avoid breaking their salary structure.