The German has been out of work since leaving Paris Saint-Germain in December but The Athletic says he is now primed to jet in to the capital.
It's claimed he'll enter the club with three staff members, with work permits settled despite Brexit red-tape.
Tuchel is going to sign an 18-month contract at the club, plus a one-year option that both parties can take up if all goes well.
Chelsea are hopeful he'll take training today before the Blues' Premier League showdown with Wolves, a game they can't afford to lose.
And an announcement is expected to be made later today as Chelsea plan for yet another new managerial era.