No team had won titles back-to-back in the Champions League era but that changed on Saturday when the title holders defeated 10-man Juventus 4-1 in Cardiff.
Cristiano Ronaldo was the hero at the Principality Stadium, scoring twice to move a step closer to matching Lionel Messi's record of five Ballons d'Or.
Congratulations @realmadrid for winning the trophy in Cardiff— FC Barcelona (@FCBarcelona) June 3, 2017
And Barca – albeit through gritted teeth – praised Madrid on social media, having also been dethroned by the Spanish capital club in LaLiga.
In a tweet, Barca wrote: "Congratulations @realmadrid for winning the trophy in Cardiff".
Madrid will now face Manchester United in the UEFA Super Cup, before going head-to-head with Barca in the two-legged Supercopa in August.