Blake Lively and Ryan Reynolds are officially adding to their family.

 Blake is pregnant and expecting another baby, who will join daughters James, Inez and Betty.

 Blake Lively is pregnant! The 35-year-old is expecting her fourth child with husband Ryan Reynolds.

Blake—who is already mom to daughters James, 7, Inez, 5, and Betty, 3—debuted her baby bump on Sept. 15.

 During an appearance at the Forbes Power Women's Summit. 

 During the event, Blake cheekily alluded to expanding her family, sharing.

 "I just like to create. Whether that's baking or storytelling or businesses or humans, I just really like creating."

Ryan and Blake, who tied the knot in 2012, often keep their daughters out of the public eye.

 But that hasn't stopped them from gushing over their family life together.