An aircraft including a wing and a wing tip device is disclosed. The wing tip device is moveable between a flight configuration for use during flight and a ground configuration for use during ground-based operations. In the ground configuration the wing tip device is folded inwardly from the flight configuration such that the span of the aircraft is reduced. The wing tip device is connected to the wing along a hinge axis by spar beams of the wing tip device, one of the beams being mounted for pivoting about a fixed axis and the other beam being mounted on a spherical bearing to provide greater freedom of movement. Various actuator arrangements may be provided to pivot the wing tip device.