"Niko played at Bayern and knows the character, structure, and DNA of the club very well".
Bayern' s latest coaching appointment has caused criticism from Frankfurt sports director Fredi Bobic who accused Munich of not acting entirely professionally.
"Niko Kovac will take over as FC Bayern head coach from 1st July 2018", the tweet read.
Kovac will be joined at Bayern by his younger brother Robert as assistant coach.
Kovac, who won 83 caps for Croatia but was born in Berlin, has been in charge of Eintracht Frankfurt since 2016.
Kovac captained Croatia towards the end of his playing career and his brother took over the armband when Niko retired from worldwide football.
The German football website Kicker said a fee of 2.2 million euros (£1.9million) would buy Kovac out of his contract, under a clause in the deal.
"Secondly, we thought for a long time about when we should tell the Frankfurters".
"There was no contact".
"We were raised as Christians and religion plays an important role for us", he revealed.
Kovac had prviously said that "there is no reason to doubt that I will be the coach of Frankfurt next season".
The Bavarians struggled to find a footing under manager Carlo Ancelotti at the start of the season, after losing to PSG in the Champions League, letting a two-goal lead slip against Wolfsburg and even losing to Hoffenheim. Champions League qualification is possible this season after another stellar campaign.
"He has a very, very good CV as a coach".
'Sitting back in Munich doesn't work as many teams have discovered. That makes him excellent. "He is no doubt predestined to coach Bayern".
Kovac is expected to take over from Jupp Heynckes, the 72-year-old retiree who came in to fill the vacuum last year October and has vehemently refused to continue with the Club after this season.