OKay Lewis. I think you've done it mate ... That is it, world champion pal!" Peter Bonnington tells Hamilton.

Hamilton sounds like he's crying on the radio. "That's the greatest moment of my life," Hamilton says. He's moved level with Senna, the man he grew up idolising.

Wheelspins and donuts from Hamilton in the final sector. He's been asked to look after his car several times but he's enjoying himself and who can blame him?

Hamilton leaps off the hood of his Mercedes and celebrates with his Mercedes mechanics."

Vettel waves to the fans. Rosberg hugs Hamilton in the weigh-in room. Vettel congratulates Hamilton as he enters as well.

Hamilton looks very emotional back there, moreso than he did when he won the title in Abu Dhabi last season. He hugs Paddy Lowe, who asks him if he's OK.

Hamilton throws a Pirelli hat across to Rosberg, who just flings it back at his team-mate. Odd.

"Where's the Stetson!?" Hamilton asks. He will get one on the podium.

Rosberg looks about as unhappy as a man can look on the podium.

Elton John giving the podium interviews.

Lap 56

Vettel goes a little deep into Turn 1 but he'll fancy his chances later in the lap.

Rosberg wobbles through Turn 11... Vettel opens up the DRS but he's not close enough to make a move there.

Lewis Hamilton wins the United States Grand Prix ... and his third world championship!

Rosberg holds off Vettel to give his team-mate everything he needs to claim the 2015 title. Back-to-back for Mercedes and Hamilton.

Verstappen crosses for fourth - my driver of the day without a doubt. What a superstar that lad is going to be.

Hamilton drives across the run-off through the Esses and pumps his fists. He's a popular man here, not only with the Brits but with the Americans as well.

Ricciardo passes Alonso on the final few corners!

Lap 55

Vettel 1.1s behind Rosberg. This one is going right to the flag. Hamilton two laps from the championship as it stands.

Rosberg really struggling, it seems, and Vettel is all over the gearbox of the Mercedes! Vettel will fancy his chances of second here. Vettel will have the advantage of DRS twice on this final lap.

Lap 54

Vettel to within two seconds of Rosberg! The championship might not be over and done with just yet.

Great on-board with Sainz as he stalks the McLaren of Button in the battle for sixth. The Toro Rosso man gets alongside Button down the backstraight and that's a nice move down the inside of Turn 12, having a slight lock of brakes but making the move stick.

Lap 53

Four laps to go. Part of me doesn't want this race to end. My fingers do, though.

Late charge from Vettel brewing? He sets a personal best but has three seconds to make up to catch Rosberg.

Ricciardo has passed Rossi for 11th. He was leading the race earlier - what a turnaround for Red Bull.

Verstappen on for a fourth position for the second time in his career. He did it in Hungary and is three laps away from doing it again.

Lap 52

Alonso has dropped back to tenth and is still complaining about no power. Rossi the next man behind him but he says he will pit once he drops out of the points. Come on Rossi! A point here would be massive.

Button has Sainz all over his gearbox. Toro Rosso's drivers having a magnificent afternoon.