UFC 160 just got super-sized, as a pair of heavyweight bouts have been made official.

In the main event, Cain Velasquez will put his UFC heavyweight title on the line against Antonio Silva. The event goes down Memorial Day weekend in May from Las Vegas.

Also, as reported by UFC Tonight Tuesday, Junior dos Santos and Alistair Overeem will collide. Both bouts were rumored for the card in the past few days.

Velasquez, who defeated dos Santos this past December, stopped Silva last May to secure his rematch with “Cigano.”

Silva worked his way past Overeem, dos Santos and the rest of the heavyweight division by defeating Overeem earlier this month.

Dos Santos and Overeem were scheduled to meet last year in May, but the former Strikeforce champion failed a pre-fight drug test. The two have engaged in several verbal battles, and the winner will likely position themselves for a future title match.