A frame assembly for a vehicle seat includes a headrest frame including at least one support pole extending downwardly from the headrest frame and a seatback frame having a central body and a pair of outer brackets extending outwardly from the central body in spaced relationship to one another. A crossbar extends between and is rotatable relative to the pair of outer brackets. The at least one support pole is secured to the crossbar for facilitating concurrent rotation of the headrest frame with the crossbar. A locking mechanism is operably interconnected with the crossbar. An actuator is movable from a first actuator position to a second actuator position to engage the locking mechanism and move the locking mechanism from a locked condition to an unlocked condition. A slide shaft extends between the pair of outer brackets and supports the actuator during movement between the first and second actuator positions.