The competition has seen a number of notable shocks already this season, and Villa will be looking to provide one more to prevent holders Arsenal from retaining the trophy.
History could be made by the Gunners this weekend as they look to become the most successful team in the long and illustrious story of the FA Cup.
Last year's success not only ended a nine-year trophy drought for the club as Aaron Ramsey's extra-time strike secured a comeback victory over Hull City, it also took them level with Manchester United as 11-time winners of the competition.
One more victory this weekend would see them become the first team to lift the famous cup 12 times, in addition to becoming the first side to retain it since Chelsea five years ago.
There is a personal goal on the line for manager Arsene Wenger too. He would overtake Sir Alex Ferguson as the competition's most successful manager of the modern era with what would be a sixth FA Cup winners' medal on Saturday.
Villa boast a claim to that title too, with George Ramsay winning six during his time in charge of the club between 1887 and 1920, but although Wenger has played down the significance of reaching that landmark, it would certainly be another memorable achievement during what has been a successful, if sometimes tumultuous, 19-year spell at the club.
The success of his managerial reign will not rest on this Saturday, but the success of Arsenal's season may do. The Gunners improved on last term's fourth-place finish in the Premier League, but they ended the campaign four points worse off and once again failed to launch a serious title bid.
Another FA Cup triumph will appease the 'Wenger out' brigade once again, but progress has been slow in recent years and a fresh assault on the league title is sorely needed.
They ended the season with just one win from their final four games, but that came in style at the Emirates as they scored four goals in the first half on their way to a comfortable victory over West Bromwich Albion.
They were less convincing in their semi-final win over Reading, needing an Adam Federici error in extra time to progress, but including penalties, the Gunners have now won 11 FA Cup games on the bounce, last losing back in February 2013.
Recent form in FA Cup: WWWWWW
Recent form (all competitions): DWLDDW
For Aston Villa, Saturday has been a long time coming. It will be their first appearance in an FA Cup final for 15 years, and their trophy drought stretches back even further to 19.
You have to go back to 1957, 58 years ago, for the last time they lifted this particular piece of silverware, although in the entire history of the cup only three teams have won it more often.
Villa's heyday came a long time ago, however, and the current crop of players will be desperate to write their own names into the history books on Saturday.
Tim Sherwood achieved his primary goal of keeping the club in the division, injecting plenty of passion and heart along the way, but FA Cup glory would likely top even Premier League survival.
It would turn a troublesome, worrying season into a memorable one for the Villans, in addition to raising optimism that they won't be put through the rigours of another relegation battle next term.
They don't come into the match in great form, however, with their league campaign tailing off after their survival was secured. An embarrassing 6-1 defeat to Southampton was followed up by a final-day loss at the hands of already-relegated Burnley, but those results will be long forgotten should they triumph in the capital.
They go into the match as underdogs, but that will not be a new scenario for Sherwood. Indeed, it may be one that he relishes, having toppled Liverpool and ended Steven Gerrard's dreams of a fairytale goodbye in the semi-finals.
It has not been an easy route to the showpiece for the Villans, who have had to overcome three Premier League teams already, in addition to a Bournemouth side that will be joining them in the top flight next season.
Much like Hull last term, Villa now find themselves just one match away from European football next season having only narrowly survived in the Premier League less than a week ago. Victory over Arsenal would see Sherwood's side qualify for the 2015-16 Europa League at the expense of Southampton.
Recent form in the FA Cup: LWWWWW
Recent form (all competitions): WLWWLL
That leaves Wenger with one less decision to make up front, although he will likely still need to choose between first-choice striker Olivier Giroud and Theo Walcott, who dazzled with a hat-trick on the final day of the season.
Kieran Richardson was also absent against Burnley on the final day of the league season, but he is hopeful of recovering in time to start this weekend. Nathan Baker made his first start since January against the Clarets and will be pushing for another ahead of Jores Okore at Wembley.
Arsenal possible starting lineup:
Szczesny; Bellerin, Mertesacker, Koscielny, Monreal; Cazorla, Coquelin, Ramsey, Ozil, Sanchez; Giroud
Aston Villa possible starting lineup:
Given; Bacuna, Vlaar, Baker, Richardson; Cleverley, Westwood, Delph, Grealish; Agbonlahor, Benteke
Head To Head
These two sides have featured in 28 and won 18 FA Cup finals between them, but they have never met each other in the showpiece of this competition.
They last met in the FA Cup in the 2011-12 fourth round, when the Gunners came from two goals behind to win 3-2, just as they did in last season's final against Hull.
We say: Arsenal 2-1 Aston Villa
Expect Villa to give this one everything. It is not every year they have the chance to win silverware and, with Sherwood at the helm, you can be sure that they will be suitably pumped up for the occasion. However, their final two league results are perhaps a sign of how much the relegation battle took out of them, and Arsenal can be deadly against a tired opponent. The Gunners returned to form on the final day of the season and, while they won't have things quite so much their way in this one, they should still have the quality to retain the trophy.