Fulham finished third in the regular season, making it the highest placed of the four teams that entered the playoffs.
Slavisa Jokanovic has called on Fulham to show ambition as they prepare for a return to the Premier League.
That figure could rise to in excess of 280 million pounds ($538 million) if the club from southwest London survives its first season back in the Premier League.
A Fulham win would put Villa's immediate future into serious doubt, wages and fees that the Championship has never experienced before could come crashing down around them.
And Khan was celebrating from the stands of what could soon be his personal property as he negotiates a deal to buy the iconic stadium from the Football Association.
The veteran wants to play on beyond this season, but has previously noted that he doesn't want to line-up against his former club Chelsea.
Villa had received a good luck message from Hollywood actor Tom Hanks, a long-distance fan of the team, while Prince William, another celebrity supporter, was cheering on his team from a private box at Wembley.
Cairney the hero as Fulham strike it rich with Premier League promotion
Aston Villa officials are convinced he will stay and are willing to negotiate a clause that would see him not play against Chelsea, if he is determined to stick by his word, according to the Guardian. The 57-year-old, who is chasing a fifth promotion to the top flight, deserves a break in more ways than one, and few outside Fulham will begrudge him if he heads off on holiday as a Premier League manager once again.
In truth, it has been a hard assignment at Villa from day one.
"If you don't make them exhausted, it will be easy for them", said Jokanovic of Villa's experienced defensive pairing.
The Villa Park outfit managed to shut out Middlesbrough in the previous round, and will be hoping they can keep Fulham at bay for 90 minutes.
The decisive blow came midway through the first half as Fulham offered a glimpse of the football that has earned so many plaudits this term, with 18-year-old Ryan Sessegnon superbly threading through Cairney to fire home.
The Scotland midfielder had timed his run perfectly, leaving Villa's defenders trailing in his wake as he slotted a cool left-footed finish into the far corner of Sam Johnstone's net. "But football won today", declared match victor Cairney.