The bling will include an 18-karat diamond ring and an 18-karat bracelet featuring 62 diamonds.
She'll also hit the red carpet with a diamond heart pendant, worth a staggering $40,000.
Picking up the gems in Los Angeles on Monday afternoon, the young star told WENN, "I love this jewellery. I could stay in it forever. I love the way it sparkles."
In the film Let Me In, Moretz plays a young vampire.