Croatian sixth seed will play the winner of Federer's semi-final with Chung.
Cilic makes light work of Edmund to reach Australian Open final - match highlights
Marin Cilic dominated British hope Kyle Edmund in straight sets to become the first Croatian to reach the final of the Australian Open on Thursday.
The world No 6 powered into his third grand slam decider with a 6-2, 7-6, 6-2 win on Rod Laver Arena over the unseeded Edmund to be the first man into Sunday's final.
He will face either defending champion Roger Federer or unseeded South Korean Chung Hyeon, who play on Friday.
"Overall I'm feeling really good," Cilic said. "Now I have two days off before the final. I noticed in the third game of the third set, when I broke him, he just let a couple of balls go past him.
"So I realised his movement was a little bit restricted, so I just tried to move the ball around and obviously that second break was extremely crucial."
It was an emphatic performance by the 2014 US Open champion, who broke Edmund's serve four times and nullified the Briton's powerful forehand. The victory ensured that he will rise to a career-high No 3 when the new rankings come out on Monday.
Cilic will be only the second player outside the "Big Four" of Novak Djokovic, Andy Murray, Rafael Nadal and Federer to reach the Melbourne final since Frenchman Jo-Wilfried Tsonga in 2008 decider.
He lost to Federer in last year's Wimbledon final, but beat the 19-time Grand Slam champion in the semi-finals on the way to his US Open triumph. Cilic trails the Swisssecond seed 8-1, but leads Chung 3-0 in their meetings.
It was a match too far for 23-year-old Edmund, who upset world No 3 Grigor Dimitrov and world No 11 Kevin Anderson on the way to his first grand slam semi-final but had little left in the tank.
Despite losing it was a breakthrough tournament for Edmund, the only British man in this year's field after five-time finalist Andy Murray's injury withdrawal.
He became only the fourth British man to reach the Australian Open semi-finals in the post-1968 Open Era.