The Gunners came from two goals down to beat Hull in extra-time last year and win their first silverware in almost a decade.
If they triumph again this weekend, they will be only the eighth side to retain the FA Cup and will become the first team to lift it 12 times.
They start as strong favourites against a Villa side appearing in their first FA Cup final since 2000.
However, Tim Sherwood’s team have already beaten three Premier League sides in the competition this year, including Liverpool in the semi-finals.
They also have the added incentive that they will qualify for the Europa League if they manage to overcome the odds and lift the trophy.
Arsenal will be without Danny Welbeck due to a knee injury but otherwise should be at full strength.
Alex Oxlade-Chamberlain and Mathieu Debuchy (both hamstring) and captain Mikel??Arteta (ankle) are in contention after returning to training following recent??injuries.
Goalkeeper Wojciech Szczesny is expected to retain his place ahead of David Ospina.
Villa keeper Shay Given should be fit to start after missing the defeat to Burnley on the final day of the season with a groin injury.
Given returned to training during the week but if he is not available, then Brad Guzan will make his first start in the competition this season.
Aly Cissokho (groin), Kieran Richardson (calf) and Jores Okore (knee) have also??trained but Ciaran Clark (knee) is out while Libor Kozak remains sidelined as he??continues to recover from a broken leg.??