Natalie Portman just proved she's an '80s baby in case anyone was wondering. Portman recently received a signed "Baby-Sitters Club" book and posted it on Instagram. "I read every single Babysitter's Club book when I was a kid. Once when I was 9, I waited in line for hours at my local bookstore to meet Ann M Martin. And today I got this in the mail from her." Portman The "BSC" book she was sent is 1989's "Kristy and the Walking Disaster".