Chelsea sealed their first championship for 50 years with victory at Bolton.
Frank Lampard struck twice in the second half as manager Jose Mourinho added the Premiership to the Carling Cup in his first season in charge.
Chelsea survived a furious Bolton assault before Lampard scored from close range on the hour.
Goalkeeper Petr Cech then produced a brilliant save from team-mate Geremi as Bolton pressed, but Lampard broke clear to add the second after 75 minutes.
Chelsea did not field the under-strength side that had been expected, although Joe Cole was left on the bench and Damien Duff and Arjen Robben were ruled out through injury.
And they were tested fully in a torrid first 45 minutes in which they were subjected to an aerial barrage from Bolton.
Stelios Giannakopoulos tested Cech early on, while Gary Speed also forced the Czech Republic goalkeeper into a fine save with a header.
Chelsea were almost non-existent as an attacking force in the first-half, and they were grateful when Kevin Davies headed straight into the arms of Cech from only six yards when he was found unmarked from Bruno N'Gotty's free-kick.
There was a worrying moment on the stroke of half-time when John Terry needed lengthy treatment on his eye when he was caught by the flailing arm of Davies.
Terry was on the ground for several minutes before returning to the action, although the word from the dressing room was that he was suffering with impaired vision.
He had recovered enough to take his place after the break as Chelsea continued to be unsettled by Bolton's uncompromising approach.
But Chelsea sprang forward to take the lead in controversial circumstances on the hour.
Bolton were furious that referee Steve Dunn did not award a foul when Jiri Jarosik bundled Fernando Hierro to the ground, but Lampard took advantage to battle his way into the area and beat Jussi Jaaskelainen with a powerful finish.
The disappointing Didier Drogba had been involved in running verbal battles with Bolton's defence, and it was no surprise when he was replaced by Robert Huth five minutes after Lampard's goal.
Chelsea keeper Cech, who produced a world-class save from Liverpool's Milan Baros in the Champions League semi-final, produced a save of almost equal quality to keep them level as Bolton pressed for the equaliser.
Speed's long throw was unwittingly deflected towards his own goal by Geremi, but Cech somehow dived high to his right to turn the ball to safety.
And the goalkeeper's worth to Chelsea was underlined as they sprang forward to put their name on the title with 15 minutes left.
Bolton were caught hopelessly upfield as Lampard broke forward and rounded Jaaskelainen to score and send Chelsea's army of fans into ecstasy.
Bolton boss Sam Allardyce on Jiri Jarosik's challenge on Fernando Hierro before the first goal:
"The referee won them this game. He failed on a major decision.
"There was nothing more blatant than that in the game. We're disappointed at the standard of the refereeing.
"There's no question that he had a major contribution in the result. He's got something to answer to - it was just not good enough.
Bolton: Jaaskelainen, Candela (Jaidi 77), N'Gotty, Ben Haim, Gardner, Hierro, Giannakopoulos (Pedersen 63), Okocha (Nolan 63), Speed, Diouf, Davies.
Subs Not Used: Poole, Fadiga.
Booked: Candela, Diouf, Jaaskelainen, Nolan.
Chelsea: Cech, Geremi, Terry, Ricardo Carvalho, Gallas, Tiago, Makelele (Smertin 90), Lampard, Jarosik, Gudjohnsen (Cole 85), Drogba (Huth 65).
Subs Not Used: Kezman, Cudicini.
Goals: Lampard 60, 76.
Ref: S Dunn (Gloucestershire).