Frantzén, whose eponymous Stockholm restaurant has held three Michelin stars since 2018, will also host Roux Scholarship 2019 winner Spencer Metzger for a three-month stage from January.
“It's a great honour to be asked to join as Honorary President for 2020,” says Frantzén.
“Having spent more than six years in the UK during my early career, the Roux Family has also been important for my own cooking.
“So it's with great pleasure I’m joining the legendary Roux Family for such an important cause in inspiring and making sure our industry is taking care of young talents; without them, our loved industry is nothing.”
The announcement coincides with the launch of the Roux Scholarship 2020.
The contest opens for entries on 12 November, after which chefs will have until 31 January to apply with a recipe using selected ingredients.
The winner will receive £6,000 to support their career development, and the chance to cook and train at a three-Michelin-starred restaurant anywhere in the world for up to three months.
Frantzén is the fifth Honorary President of Judges to play a part in the Roux Scholarship, following on from the likes of Pierre Gagnaire, Anne-Sophie Pic, and Peter Gilmore.
“It’s a privilege to welcome Björn Frantzen as our Honorary President,” says competition chairman Alain Roux
“He is a modern icon, an astonishing chef, and easily one of the most exciting and creative chefs working in Europe today.”