Inside Man City's FA Cup celebration as Jack Grealish posts hilarious dressing room video

Jack Grealish has posted a hilarious video from within the Manchester City dressing room following their FA Cup victory earlier today.

Pep Guardiola's side were able to secure their second trophy of the season at Wembley Stadium this afternoon as they beat local rivals Manchester United in the FA Cup final.

German international Ilkay Gundogan opened the scoring after just 12 seconds, breaking the record for the fastest goal in the final whilst doing so, with a stunning volley past David De Gea in the United goal. Before adding another first time effort to his tally in the second half to win the game, after Bruno Fernandes had levelled proceedings from the penalty spot.

Manchester City lift the FA Cup

With the Premier League trophy already in the bag and the FA Cup also added to their list, City will now look ahead to their imminent Champions League final against Serie A giants Inter Milan next week as they eye a historic treble to round off another impressive season under Guardiola's watch.

However, despite the huge game on the horizon, this hasn't stopped the City stars celebrating their derby win earlier today. As clearly pictured by England international Jack Grealish on his personal Instagram.

The playmaker has posted a video revealing the celebrations amongst the players, which feature kit-man Brandon Ashton sliding through the legs of defender John Stones in his underwear with the rest of the squad huddled around.

Grealish, 27, could have been acting very differently come the full-time whistle today having given away the penalty which led to the United equaliser. Referee Paul Tierney deemed the player to have handled the ball in his own penalty area following a header from Aaron Wan-Bissaka, despite Grealish clearly not intentionally doing so whilst facing the other way.

A controversial decision which ultimately didn't cost City on this occasion but they will be hoping to avoid any similar incidents a week from now, as they prepare to face Simone Inzaghi's side at the Atatürk Olympic Stadium in Istanbul to capture the one trophy eluding Guardiola and his squad since his arrival in 2016..