The Kansas City Chiefs became NFL champions for the second time in four years after fighting back to claim a thrilling 38-35 win over the Philadelphia Eagles.

The Chiefs trailed for much of Super Bowl 57 in Phoenix and were 27-21 down heading into the final quarter.

But despite limping after aggravating an ankle injury, quarterback Patrick Mahomes and veteran coach Andy Reid orchestrated a route back in front of 67,827.

Mahomes, who was named the season's Most Valuable Player for a second time last week, made touchdown passes to Kadarius Toney and Skyy Moore to put Kansas City in front for the first time.

The Eagles levelled after a third rushing touchdown by Jalen Hurts, followed by a two-point conversion by the third-year quarterback.

But a heroic 26-yard run by Mahomes made the ground for Harrison Butker to kick a game-winning field goal from 27 yards.

Mahomes' performance saw the 27-year-old become the first player since 1999 to win the season MVP, the Super Bowl and the Super Bowl MVP in the same season.

He has led the Chiefs to at least the AFC Championship game in all five seasons as a starter and many argued that, for the Reid-Mahomes era to be considered a dynasty, they had to win another Super Bowl.

"I am not going to say a dynasty yet, we are not done," warned Mahomes.

"I told you nothing was going to keep me off the field. I want to thank my team-mates - we challenged each other and it took everybody."

Reid said of Mahomes: "He wants to be the greatest player ever and that's the way he goes about his business. And he does it humbly, there's no bragging.

"The great quarterbacks make everybody around him better, including the head coach. So he's done a heck of a job."

Chiefs tight end Travis Kelce added: "I've got Andy Reid and Patrick Mahomes, I have a great team, we had an unbelievable run.

"We were uncharacteristic in the beginning [of the game] but everyone had that look in their eye that they would leave it all out there on the field and that is what we did."