The blockbuster UFC 300 card is starting to take shape.

The card, which will take place on April 13, is set to be one of the biggest in promotional history and an even which UFC boss Dana White has teased as having numerous high profile matchups between the opening prelim and the main event.

While the UFC have yet to confirm a main event for the fight card, it has been announced by UFC brass that Aljamain Sterling, Bo Nickal and Jan Blachowicz will compete at the event.

Sterling, the former bantamweight champion, will move up to featherweight to take on Boston’s Calvin Kattar in what will be his first fight at 145-pounds since July 2011, before he was a member of the UFC roster. Sterling has also competed at 140-pounds in the UFC — in what was a catchweight contest against former bantamweight champ Renan Barao. Sterling won the fight by unanimous decision.

Kattar, meanwhile, has lost two straight — though the last of these was due to a knee injury sustained in the opening seconds of the second round in a fight with Arnold Allen in October of last year.

Elsewhere, collegiate wrestling standout Bo Nickal will return to the Octagon at UFC 300 to fight the 10-5 Cody Brundage — a fighter who has posted a 3-4 record in the promotion thus far. Nickal is 5-0 overall and has won his first two UFC bouts by first round finish.

Finally, former light heavyweight champion Jiri Prochazka will seek to get his title ambitions back on track when he fights Aleksandar Rakic.

Watch the video above to see Dana White mention some additional fight announcements, including Ian Machado Garry, Paulo Costa, Robert Whittaker and others.