Narita Express

I will be traveling in Japan for two weeks in May and will purchase a JR 7-days pass as usual.

I will not start using my JR pass on the first week, as someone will pick me up at the Narita Airport when I arrive.

This time I will validate and start using my JR pass for the last week of stay, can I still use the pass for using the Narita Express from Tokyo to Narita Airport on the 7th day?