The Kansas City Chiefs are Super Bowl champions again, 50 years after winning their first title.

The Chiefs, led by star quarterback Patrick Mahomes, rallied from a 10-point fourth-quarter deficit to defeat the San Francisco 49ers 31-20.

Mahomes threw two touchdowns in the fourth quarter, the second to running back Damien Williams. Williams also ran for a touchdown with 1:12 left to put the game out of reach.

Mahomes was named the game's Most Valuable Player. He also ran for a touchdown.

The game capped the NFL's 100th season.

Kansas City's Derrick Nnadi makes a confetti angel after the game.
Kansas City's Derrick Nnadi makes a confetti angel after the game.
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Mahomes speaks with San Francisco quarterback Jimmy Garoppolo after the game.
Mahomes speaks with San Francisco quarterback Jimmy Garoppolo after the game.
Matt York/AP
San Francisco wide receiver Deebo Samuel walks off the field at the end of the game.
San Francisco wide receiver Deebo Samuel walks off the field at the end of the game.
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Mahomes celebrates a late touchdown.
Mahomes celebrates a late touchdown.
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Kansas City Chiefs head coach Andy Reid reacts after being doused with Gatorade at the end of the game. This is Reid's first Super Bowl title as a head coach.
Kansas City Chiefs head coach Andy Reid reacts after being doused with Gatorade at the end of the game. This is Reid's first Super Bowl title as a head coach.
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Kansas City running back Damien Williams celebrates his long touchdown run that put the final flourish on the Chiefs' victory.
Kansas City running back Damien Williams celebrates his long touchdown run that put the final flourish on the Chiefs' victory.
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Garoppolo reacts after being sacked late in the game.
Garoppolo reacts after being sacked late in the game.
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Williams reaches across the goal line to give the Chiefs a 23-20 lead in the fourth quarter.
Williams reaches across the goal line to give the Chiefs a 23-20 lead in the fourth quarter.
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Williams celebrates with tight end Travis Kelce after Kelce caught a touchdown pass to cut into San Francisco's fourth-quarter lead.
Williams celebrates with tight end Travis Kelce after Kelce caught a touchdown pass to cut into San Francisco's fourth-quarter lead.
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The 49ers celebrate after Fred Warner intercepted a Mahomes pass in the second half.
The 49ers celebrate after Fred Warner intercepted a Mahomes pass in the second half.
Mark J. Terrill/AP
Warner is tackled by Tyreek Hill after his interception.
Warner is tackled by Tyreek Hill after his interception.
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Mahomes looks for the ball after it was knocked out of his hands in the second half.
Mahomes looks for the ball after it was knocked out of his hands in the second half.
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Kansas City fans cheer during the second half.
Kansas City fans cheer during the second half.
Wilfredo Lee/AP
49ers wide receiver Kendrick Bourne is tackled by Chiefs cornerback Charvarius Ward in the third quarter.
49ers wide receiver Kendrick Bourne is tackled by Chiefs cornerback Charvarius Ward in the third quarter.
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San Francisco head coach Kyle Shanahan instructs his players during the game.
San Francisco head coach Kyle Shanahan instructs his players during the game.
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Mahomes looks down the game.
Mahomes looks down the game.
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Garoppolo throws a pass in the third quarter.
Garoppolo throws a pass in the third quarter.
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49ers kicker Robbie Gould gives San Francisco a 13-10 lead in the third quarter.
49ers kicker Robbie Gould gives San Francisco a 13-10 lead in the third quarter.
Morry Gash/AP
San Francisco's Kyle Juszczyk leaps into the end zone to score a touchdown in the second quarter. The game was tied 10-10 at halftime.
San Francisco's Kyle Juszczyk leaps into the end zone to score a touchdown in the second quarter. The game was tied 10-10 at halftime.
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Juszczyk celebrates his touchdown catch.
Juszczyk celebrates his touchdown catch.
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Mahomes runs in for the game's first touchdown.
Mahomes runs in for the game's first touchdown.
Jamie Squire/Getty Images
Mahomes and the Chiefs celebrate his early touchdown.
Mahomes and the Chiefs celebrate his early touchdown.
Kevin C. Cox/Getty Images
Williams loses his helmet in the first quarter.
Williams loses his helmet in the first quarter.
Kevin C. Cox/Getty Images
San Francisco tight end George Kittle is tackled by Daniel Sorensen in the first quarter.
San Francisco tight end George Kittle is tackled by Daniel Sorensen in the first quarter.
Wilfredo Lee/AP
Kansas City safety Tyrann Mathieu tries to tackle Samuel.
Kansas City safety Tyrann Mathieu tries to tackle Samuel.
David J. Phillip/AP
Chiefs fans cheer on Mahomes in the first half.
Chiefs fans cheer on Mahomes in the first half.
Mark Humphrey/AP
Kansas City's Mecole Hardman returns the opening kickoff.
Kansas City's Mecole Hardman returns the opening kickoff.
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Singer Demi Lovato performs the National Anthem before the game.
Singer Demi Lovato performs the National Anthem before the game.
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The game was played at Hard Rock Stadium in Miami Gardens.
The game was played at Hard Rock Stadium in Miami Gardens.
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The Chiefs take the field during pregame introductions.
The Chiefs take the field during pregame introductions.
Morry Gash/AP
The NFL's top 100 players of all time were honored before the game.
The NFL's top 100 players of all time were honored before the game.
Rob Carr/Getty Images
San Francisco 49ers assistant coach Katie Sowers talks with players before the start of the game. She is <a target="_blank">the first woman and openly gay person to coach in a Super Bowl.</a>
San Francisco 49ers assistant coach Katie Sowers talks with players before the start of the game. She is the first woman and openly gay person to coach in a Super Bowl.
Mark Humphrey/AP
Rapper Jay-Z watches his daughter, Blue Ivy, leap on the field before the game.
Rapper Jay-Z watches his daughter, Blue Ivy, leap on the field before the game.
David J. Phillip/AP
Former baseball star Alex Rodriguez tosses a football before the game. His girlfriend, Jennifer Lopez, performed during <a target="_blank">the halftime show.</a>
Former baseball star Alex Rodriguez tosses a football before the game. His girlfriend, Jennifer Lopez, performed during the halftime show.
Chris O'Meara/AP
Fans are seen outside Hard Rock Stadium.
Fans are seen outside Hard Rock Stadium.
Eva Marie Uzcatgegui/AFP/Getty Images
Both teams stand on the 24-yard lines before the game to observe a moment of silence for NBA legend Kobe Bryant, Bryant's daughter Gianna and other people who died in a helicopter crash last week.
Both teams stand on the 24-yard lines before the game to observe a moment of silence for NBA legend Kobe Bryant, Bryant's daughter Gianna and other people who died in a helicopter crash last week.
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A picture of Bryant and his daughter are seen in the stadium.
A picture of Bryant and his daughter are seen in the stadium.
Rob Carr/Getty Images
49ers wide receiver Emmanuel Sanders wears cleats honoring Bryant.
49ers wide receiver Emmanuel Sanders wears cleats honoring Bryant.
Matt York/AP