Chris Weidman will defend his UFC middleweight title against Luke Rockhold at UFC 194 in Las Vegas on Dec. 12.

It will serve as the co-main event, with Jose Aldo defending his featherweight title against interim champion Conor McGregor in the main event.

"This is me building my legacy," said the undefeated Weidman (13-0, 9-0 UFC) on ESPN SportsCenter on Thursday night.

Weidman, from Baldwin, is coming off his third title defense. He stopped Vitor Belfort in the first round last May at UFC 187.

Rockhold (14-2), from Northern California, has won four straight, the most recent being an impressive second-round submission of Lyoto Machida last April.

"The difference between me and a Weidman is our Machida fights," Rockhold said on ESPN.

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"He's beaten a bunch of old Brazilians," Rockhold added. "It's time for the belt to change.

"Weidman is slow, he kicks like Michael Bisping, he's not gonna be able to keep up with me."

This is the second straight co-main event for the middleweight champion. Weidman took second billing to Daniel Cormier and Anthony Johnson fighting for the vacant light heavyweight title at UFC 187.

The UFC typically gives the higher weight class top billing when two title fights are on the same card. But for UFC 194, the featherweights Aldo and McGregor will get their names in the bigger font size.

Aldo vs. McGregor was supposed to occur at UFC 189 last month, but Aldo, from Brazil, pulled out with a rib injury less than two weeks before what was being billed as the biggest fight of the year. McGregor, from Ireland, is one of the fastest rising stars in the company.