Daniel Cormier became only the second UFC champion to hold belts in two weight classes last night in Las Vegas.

Cormier (21-1) won the UFC heavyweight championship at UFC 226 by knocking out Stipe Miocic with a short right hand in the bout’s first round. The official finish came at the 4:33 mark with Miocic crumbling to the mat, ending the longest reign in UFC heavyweight history.

Cormier joins Conor McGregor as the only UFC fighters to hold titles simultaneously in two weight classes. McGregor was the first by accomplishing the feat in 2016. Cormier also hold the light heavyweight championship belt.

What came as a surprise – or maybe inspired by the latest UFC Hall of Fame inductee Ronda Rousey – was Brock Lesnar sitting cageside at the event and eventually making his way into the octagon. Cormier, an avid wrestling fan, called him up.

“There’s a guy I’ve known for a long time,” Cormier said. “He’s a wrestler. He’s an All-American. He’s a former UFC champion. I never thought I would fight him — but Brock Lesnar, get your ass in here!”

The two, of course, squared off in the ring and ending with Lesnar shoving Cormier and stating, “DC, I’m coming for you, motherfucker.”

The 40-year-old Lesnar’s last stint in the UFC ended with a defeat of Mark Hunt at UFC 200 in July of 2016. Unfortunately it was revealed Lesnar failed multiple drug tests and the decision was changed to a no contest. He is currently under suspension by the US Anti-Doping Agency.

When asked about the potential bout, UFC president Dana White promptly stated, “We’re definitely going to make that fight.”

Cormier was originally in the UFC heavyweight division, but elected to move to light heavyweight because of his teammate, former UFC heavyweight champion Cain Velasquez.

“I was a heavyweight for a long time, and I left this division,” Cormier said. “I never knew what I could become, but tonight, I got the answer. I’m a two-division champion, baby.”