Duo Launch '12 Shades'
Gibson and Vellios signed copies of charity calendar on Thursday.
The duo were at Everton Two to sign copies of '12 Shades of Blue', which features members of the first-team squad as they have never been seen before.
In the build-up to the launch, Evertonians had been provided with sneak peeks of the calendar, with images from the photoshoot revealed on the Club's Twitter, Facebook and Instagram pages.
And fans were finally able to see the final product and meet two of the players featured in the flesh at the event on Thursday.
Click here to view images from the calendar launch.
'12 Shades of Blue' is now available to buy from Everton One, Everton Two or online here.