A stroller having an articulated frame with at least one front leg, at least one rear leg, and a reclinable seatback support. An adjustment member is fixed to the frame and defines a plurality of detents that correspond to selectable recline positions for the reclinable seatback support. A locking member is movably attached to the reclinable seatback support and removably engages one of the plurality of detents. An actuator handle is connected to the locking member and is movably mounted on a handle guide that is fixed to the seatback support. The actuator handle is slidable along the handle guide to a first position to move the locking member away from one of the plurality of detents and slidable along the handle guide to a second position to move the locking member into engagement with one of the plurality of detents.