The Blues took the lead inside five minutes, when Olivier Giroud's neat flick found the feet of Christian Pulisic, who danced beyond a challenge and fired home from close range. Arsenal responded well, with Nicolas Pepe curling home an excellent strike from a lovely team move, only for his effort to be ruled out for an offside infringement.
Mikel Arteta's men did draw level on 28 minutes however, when Pierre-Emerick Aubameyang was hauled down inside the penalty area by Cesar Azpilicueta, and the Gabon international coolly converted the subsequent spot-kick.
Mateo Kovacic was then given his marching orders for a controversial second yellow card to deepen the Blues' woes, and Frank Lampard's men struggled to get a foothold in the match from then on. Arsenal defended resolutely and held on to claim their 14th FA Cup success, and the first of Mikel Arteta's reign.
Arsenal fans on Twitter went absolutely wild after their team won a record 14th FA Cup crown and they pounced on Twitter in huge numbers in order to express their delight at ending their season with silverware.
Here are some of the best reactions: