The Furious 7 star welcomed son Julian with film producer husband Andrew Form via a surrogate in 2013 and she admits she sometimes feels "awkward" when other mums talk about their delivery room memories.

"I didn't really have a choice about being open, since it was obvious I wasn't pregnant," she tells Yahoo! Parenting. "And for me it wasn't a choice; I needed to use a surrogate.

"I didn't feel judged; it's more like I felt awkward. Even recently, we were at this baby group and the teacher made the assumption, 'Well, you all birthed your children...' and I couldn't be like, 'Well, actually...' So sometimes I feel a little left out when other moms talk about what their birth experience was like, and I feel the loss of not having carried or having been able to carry.

"Luckily, I keep my circle tight and close, so I never feel judged. In many ways, I feel lucky that I was able to be open. There are so many women who are young and have to go through IVF (in vitro fertilisation) and feel like they can't talk about it, and that's really unfortunate."

And the actress insists her "awkward" feelings about surrogacy won't stop her from adding to her brood.

"If I could just visualise it and make it happen, that would be awesome," she continues. "I badly want Julian to have a brother or sister, and God-willing it will happen soon."