“#thefutureisSisterhood,” Ferrera, 33, captioned the image with Tambyln, 34, and her baby girl.
In June, the Joan of Arcadia actress posted a photo with Marlow alongside a political statement.
In March, Tamblyn and husband, Arrested Development star David Cross, introduced their daughter and revealed her full name: Marlow Alice.
In February, The Ring star announced the birth of their first child with a funny, faux baby name.
“David and I are proud to announce the birth of our daughter, Dauphinoise Petunia Brittany Scheherazade Von Funkinstein Mustard Witch RBG Cross Tamblyn-Bey jr. #TheFutureIsFemale,” she wrote.