Translatable cascade thrust reverser

A nacelle assembly for a high-bypass gas turbine engine (10) includes a fan nacelle (34) that includes a first fan nacelle section (34A) and a second fan nacelle section (34B), the second fan nacelle section (34B) movable relative to the first fan nacelle section (34A). A cascade array (56) is mounted to the first fan nacelle section (34A) for movement relative thereto between a stored position and a deployed position, the stored position locates the cascade array (56) at least partially within the first fan nacelle section (34A).