The England international struck twice after the break as a rampant City put Watford to the sword to create English footballing history.
The 6-0 win - the joint biggest in FA Cup final history - sealed a unprecedented quadruple of domestic trophies for City with the Premier League, FA Cup, Carabao Cup and Community Shield all now secured.
And for Sterling, who grew up in the shadow of Wembley as a boy, City's sixth FA Cup final success was a day he’ll never forget.
"I grew up here and saw this stadium get built. It's a massive dream come true to be on this field win trophies here,” said Sterling.
"It shows what the manager is building here.
"The boys did brilliant. My goals added to the win. It was brilliant from everyone.
“At the start of the season he said we needed to get the mentality right and let’s go for the Premier League we did that and did it exceptionally well.
“Credit to the boys to have been mentally switched on form the word go.
"It's been a long season with the World Cup as well but everyone has been focused and on their A-game and come through."