Former Socceroos skipper Mile Jedinak scored with his only kick in the game as Aston Villa reached the League Championship final by beating West Bromwich Albion in a penalty shootout.
Villa beat West Brom 4-3 in Wednesday's (AEST) shootout after their semi-final finished 2-2 on aggregate following West Brom's 1-0 win in the second leg.
Jedinak came on with just seconds remaining and slotted the team's second spot kick as the Villans seek a return to the Premier League after a three-year absence.
Tammy Abraham, on loan from Chelsea, scored the decisive spot kick to send Villa fans into a frenzy.
Relegated in 2016, Villa will be hoping to avoid a repeat of last year when they lost to Fulham in the playoff final.
"It's no good getting to Wembley and falling at the final hurdle again, so fingers crossed," Villa midfielder Jack Grealish, who converted his penalty, told Sky Sport.
"All of us are very hungry and have good legs in us."
Villa won the first leg 2-1 at home but Craig Dawson's first-half header levelled it up for West Brom, who had finished four points above Villa in the regular season.
The hosts had Chris Brunt sent off with 10 minutes of normal time remaining but keeper Sam Johnstone made a stunning reflex save to deny Albert Adomah and take the tie into extra time.
Villa laid siege to the West Brom goal in the extra 30 minutes and could have had a late penalty for handball but the 10-man hosts held firm to take it to penalties.
Visiting keeper Jed Steer put Villa in control with great saves from Mason Holgate and Ahmed Hegazi.
"There's obviously a lot of luck involved but wow – we practise penalties, so I think I must've faced 100 a day the last few days," Steer said.
After Conor Hourihane, Jedinak and Grealish made it 3-1, Adomah could have sealed it for Villa but lifted his kick over the bar.
James Morrison beat Steer to pile the pressure on but Abraham found the net via Johnstone's leg to spark celebrations among the away fans.
Leeds take a 1-0 lead over Derby into Thursday's (AEST) second leg at Elland Road for the right to face Villa on May 27.
The Championship playoff final is regarded as the most lucrative match in world soccer, with last year's clash between Fulham and Villa worth about £170 million pounds ($A316 million) even if, as in Fulham's case, the winner is relegated after one season in the top flight.
Norwich City and Sheffield United were promoted automatically after finishing as the top two in the regular season.