A vehicle seat assembly includes a support structure and a headrest supported by the support structure. The headrest includes a headrest body that is movable with respect to the support structure between a stowed position and a use position, and a locking mechanism for locking the headrest body in the use position. When the headrest body is in the use position, the locking mechanism is releasable to allow the headrest body to rotate rearwardly and slide downwardly to the stowed position.