Soccer: Seedorf confirms he's taking over at Milan
Dutch midfielder set to return to former club as coach14 January, 16:58
The Dutch midfielder, who has played for Brazilian side Botafogo since leaving Milan in 2012, said he will hang up his boots to devote himself fully to the new role.
Milan, who are 11th in Serie A and trail leaders Juventus by 30 points at the season's half-way mark, sacked coach Massimiliano Allegri on Monday after Sunday's humiliating 4-3 defeat to promoted Sassuolo.
"I'm here to announce that after 22 years I'm going to stop playing," Seedorf, 37, told a news conference.
"This experience of a year and a half (at Botofago) has enabled me to grow a lot and it will help me in my next step, which will be as coach of Milan".
Seedorf won two Champions League titles and two Serie A crowns, among many other honours, during a 10-year stint as a player with Milan from 2002 to 2012.