Guus Hiddink IS the new Chelsea coach, but will only be in charge until the end of the season at the moment.
Hiddink has been named as the club's temporary coach, taking over from former boss Luiz Felipe Scolari, who was sacked on Monday.
Hiddink is currently the coach of the Russian national team, and he will do that job as well as leading Chelsea.
He is expected to meet his new players on Friday, and will watch their FA Cup match with Watford on Saturday evening.
It's thought he's agreed to take on the job because he is good friends with Chelsea owner Roman Abramovich.
The first time Hiddink will pick the team at Chelsea will be for their next Premier League match, which is a big game away to Aston Villa on 21 February.
Chelsea owner Roman Abramovich and Guus Hiddink watch a game together in August 2008
He will be the fourth boss of Chelsea in less than a year-and-a-half, following Jose Mourinho, Avram Grant and Scolari.
Milan man next?
And rumours are already flying that another man will be in charge at Stamford Bridge in time for next season - AC Milan coach Carlo Ancelotti.
However, if Hiddink does a really good job then there is a chance he may be asked to stay on for next season as well.