Socceroos star Aaron Mooy will line up with Huddersfield Town against Reading for the big prize: a spot in next season's English Premier League.
The winner will take their place at the top table of English football in the 2017/18 Premier League.
For Huddersfield, it would be their first appearance in English football's top flight since 1971/72.
They were relegated to the old Second Division that season after finishing bottom of the First Division, winning just six of their 42 games.
The clashes between the two this season have been tight affairs.
In September, Huddersfield played 65 minutes with ten men after winger Rajiv van La Parra was sent off.
Reading made the most of it, with Roy Beerens scoring the game's only goal.
Huddersfield turned the tables when the two met again in February.
A late strike by Philip Billing gave Town a 1-0 win.
Huddersfield progressed to the final courtesy of a dramatic penalty shootout after their two-legged semi-final against Sheffield Wednesday was locked at 1-1 after 210 minutes.
Before that, they stumbled towards the finish line somewhat, losing six of their last ten Championship matches to finish fifth.
Reading beat Fulham 2-1 over the two legs in their semi-final. Their late-season form was very good, winning seven of their last nine league games to finish third.
The former Melbourne City star has been a revelation in his first season for the Terriers.
On loan from Manchester City, Mooy has been an absolute standout in Town's midfield.
His consistency was remarkable, missing just one of Huddersfield's 48 league matches.
He took out the top honour at the club's annual awards, being named Huddersfield's Player of the Year.
He was also included in the EFL Team of the Season and Championship PFA Team of the Year.
Reading vs Huddersfield
Tuesday, 30 May, 12:00 AM AEST
Wembley Stadium, London