Pierre-Emerick Aubameyang inspired Arsenal to a record 14th FA Cup win as the Gunners captain struck twice to beat Chelsea 2-1 in the final at an empty Wembley on Saturday.
Christian Pulisic had given Chelsea the dream start, but the Blues unravelled after Aubameyang was brought down by Cesar Azpilicueta inside the area and converted the resulting penalty.
A brilliant finish from Aubameyang 23 minutes from time earned Mikel Arteta silverware in his first season as Arsenal boss before Chelsea were controversially reduced to 10 men when Mateo Kovacic was shown an extremely soft second yellow card.
Arteta said ahead of the final he hoped a taste of success would encourage Aubameyang, who only has a year left on his contract at the Emirates, to commit to a new long-term deal.
The Gabon international's double took his tally for the season to 29 and ensured the Gunners will not miss out on European football next season for the first time since 1995/96 as they qualify for the Europa League.
An FA Cup final unlike any other with nearly 90,000 empty seats saw the traditional singing of "Abide With Me" performed on the Wembley roof.
Chelsea had already achieved their primary goal from Frank Lampard's first season in charge by securing a place in next season's Champions League last weekend and early on they seemed set to cap a top-four finish with Lampard's first trophy as a manager.
Emiliano Martinez flew to his left to turn Mason Mount's shot behind, but Arsenal did not heed that warning as Chelsea's front three combined perfectly for the opener on five minutes.
Mount's low cross was flicked on by former Arsenal striker Olivier Giroud and Pulisic continued his scoring streak since football's return in June by showing quick feet before prodding the ball home.
Arteta has gained plenty of plaudits for his tactical nous during his first eight months in a managerial role and the Spaniard managed to reorganise the Gunners during the first-half drinks break to change the momentum of the game.