Kyril Louis-Dreyfus (center) took part in the semi-final win of the EFL Trophy against Lincoln in Sunderland on Wednesday
Kyril Louis-Dreyfus became chairman of Sunderland at the age of 23 after his acquisition of the League One club was approved by the EFL.
The Frenchman is the son of former Marseille owner Robert Louis-Dreyfus and will become the youngest chairman of English football.
Former Sunderland owner Stewart Donald will keep a minority stake.
“Kyril’s dedication, sagacity and integrity convinced us to accept his proposal,” said Donald.
“His vision and desire to restore Sunderland to success were evident from the start. We believe his offer gives the club the best chance of long-term success and sustainability.”
It was agreed for Louis-Dreyfus to acquire a majority stake in Sunderland in December. He succeeds former Eastleigh owner Donald, who became the club’s majority shareholder when he bought the Black Cats from Ellis Short in May 2018.
Donald had tried to sell the Black Cats for more than a year and stepped down as chairman in July.
Louis-Dreyfus admitted that due to the “current football landscape” there were “challenges to be overcome”, but gave cause for optimism.
“I am proud to be an administrator of this prestigious institution, but I also recognize the significant responsibility that comes with it,” he said.
“I am confident that together we can weather the current storm and lay solid foundations to bring the club sustainable and long-term success.”
Charlie Methven and Juan Sartori will keep a minority stake in Sunderland alongside Donald.