And they can thank fierce rival Manchester United for that.
Mourinho's second-placed United slipped to a shock 1-0 loss to bottom side West Brom yesterday, a result that put runaway leaders City out of reach.
"Our Time. Our City".
United had to at least draw to keep the title race mathematically alive but were stunned at Old Trafford when Jay Rodriguez headed home after the break. Vincent Kompany did, with images showing the City captain celebrating at his in-laws' house where he was having dinner. During the week I was trying to fight that because I was feeling it'.
Goalkeeper Ederson Moraes was watching former club Benfica play Porto in the Portuguese league.
Mourinho was asked in his post-match press conference on Sunday if he felt he was getting enough consistency from his more experienced players.More news: Bella Hadid And The Weeknd Were Reportedly "Kissing All Night" At Coachella
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The Premier League triumph means Guardiola joins Mourinho and Carlo Ancelotti as one of only three managers to win a title in three of Europe's top five leagues.
Manchester United won both the Europa League and League Cup in Mourinho's first campaign in charge last season. Said row, according to the BBC, saw milk and water thrown at Mourinho after he complained over what he deemed excessive celebrations in the away dressing room.
Needless to say supporters of the club were unimpressed by the video and took to Twitter to vent their frustration, clearly of the belief that something better could have been concocted.
Few - including Guardiola - expected it to happen on Sunday.
In the 20 months since, we have witnessed the colourful hairstyles, flamboyant dance routines, jewellery and even a personalised emoji. The defeat at Old Trafford helped the Etihad outfit mathematically win the Premier League. In December, Sportsmail revealed two of United's support staff had been despatched to the player's house in Hale Barns to get him out of bed after he failed to show up for training.
"If I play a player against Bournemouth and he plays phenomenal, he plays the semi-final", Mourinho said.
"If I was in their position, I would be very upset if people said that Manchester City won the title because Manchester United lost to West Brom".