The Gunners defend their title when they face Aston Villa at Wembley in the climax of the domestic campaign.
Arsenal v Aston Villa
The FA Cup Final
5.30pm, Saturday 30 May 2015
Wembley Stadium connected by EE
Live on BBC and BT Sport
And after finishing their Premier League term in third spot, the England midfielder is hoping Arsene Wenger’s men can end the season on a high by winning the Cup.
"I think that will define if we have a good season or not," said Wilshere.
"Okay, we did finish third in the league which is progression from last year [when] we finished fourth.
"We wanted to get to second this year but unfortunately we couldn't manage that.
"So now we're looking to finish the season off with the Cup and it would be nice to do that."
The 23-year-old has seen his season disrupted by an ankle injury, which kept him sidelined for six months between November and May.
But after battling back to fitness, he returned to first-team duty and capped the season off with a goal in Arsenal’s 4-1 win over West Bromwich Albion last weekend.
Now, he’s hoping to get the nod from boss Wenger to feature in Saturday’s game under the arch as Arsenal aim to retain the prize they won last May.
"I really want to play, I feel really good. Of course it's down to the manager but hopefully I will play," he admitted during an event announcing him as an ambassador of Muscular Dystrophy UK.
"I've been injured for a long time this season. I've worked hard. All I want to do at the minute is play football.
"It's probably the biggest game of the season. I've been injured for a lot of the season so it's been frustrating and I've worked really hard to come back.
"When you're injured you're having those dark, lonely days in the gym when all the players are training.
"So when you come back and you get to major finals and you can win major trophies, that definitely is something that keeps you going."