3 youngest (and 3 oldest) WWE Champions of all time 

#1 Youngest WWE Champion: Brock Lesnar (25 years, 1 month, 13 days)

Lesnar with Heyman

"The Next Big Thing" Brock Lesnar won the King of the Ring tournament in 2002, and earned a shot at the WWE title. On the other hand, The Rock had defeated Undertaker and Kurt Angle in a Triple Threat Match at Vengeance 2002 to win the title.

At SummerSlam, Brock Lesnar defeated The Rock to become the youngest WWE Champion of all time, kicking off a dominant reign that saw Lesnar put down Undertaker inside Hell in a Cell.

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#1 Oldest WWE Champion: Mr. McMahon (54 years 21 days)

Vince McMahon

It's still weird to think that Vince McMahon of all people once won the WWE title. On an episode of SmackDown in 1999, Triple H put his WWE title on the line against Vince McMahon, who was out to defend the honor of his family in the squared circle.

After suffering a brutal beatdown at the hands of Triple H, Vince McMahon was aided by Stone Cold Steve Austin, when The Rattlesnake came out and attacked Triple H and Chyna. He then pulled Vince and put him atop an unconscious Triple H. Shane McMahon made the three-count and Vince became the oldest WWE Champion in history.

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