The 26-year-old star, who gave birth to a son with husband Jamie Bell in July 2013, returned to work after taking a four-month break from filming to spend most of her time with her baby, reported Contactmusic.
"I was lucky because I had done three films and got pregnant so I was like, 'I've got stuff in the can. I'm taking a break'," Wood said.
"I've been having separation anxiety because I'm so used to him being right here all the time. They kind of become a part of you, you know," she added.