The Gunners are going to Wembley for a second year in a row.
Two goals from Alexis Sanchez, with a helping hand from Adam Federici, took The Gunners to the final.
Arsenal of course will now be hoping to go to Wembley and defeat Villa, to retain their title. Last season saw Arsenal win the FA Cup with a win against Hull City to end their long trophyless drought.
Arsenal fans were of course over the moon with the result, but so were the players.
Plenty of the players who featured in the game were obviously overjoyed and wanted to let their followers on Twitter know it.
The likes of Mesut Ozil, Aaron Ramsey and Alexis Sanchez all took to Twitter after the game to express their joy on the fantastic result, even if it was not quite the best performance to get them there.
Even Lukas Podolski, who is currently loaned out to Inter Milan, decided to pay tribute to his parent club as they look to retain their title.
Yes feliz por el triunfo y por el equipo .. . Happy for our victory and for our team https://t.co/ggKqSwIwtm— Alexis Sánchez (@Alexis_Sanchez) April 18, 2015
Weee did it!!