Rob Gronkowski was always the life of the party.

Gronk announced his retirement from the NFL with an Instagram post Sunday, and we immediately thought about some of the classic moments we shared with him.

This included his Super Bowl selfie in the locker room, a humblebrag about his schoolwork and a not-so-humble brag about delivering in the clutch. Check out the video above to see Gronk being Gronk.

Follow ThePostGame on Twitter @ThePostGame.