The England midfielder - out for more than a year with ankle and knee injuries before returning to action this season - capped a man-of-the-match display to finally beat inspired Swansea goalkeeper Michel Vorm with a 20-yard strike on 86 minutes to set up a trip to Brighton and keep alive hopes of Arsenal's first trophy since 2005.
The Gunners were much improved from the lacklustre 2-0 Barclays Premier League defeat to Manchester City on Sunday and, but for a combination of poor finishing and brilliant defending, would have had the replay wrapped up well before Wilshere's fine late effort.
Source: PA
Source: PA