She posed scrunched up tight in a bathtub to put herself in the position of the orcas at SeaWorld. The campaign proclaims: "SeaWorld: Separating Babies and Mothers Since 1970," of the theme park's controversial practice.
"Being a mom and seeing Blackfish, it was extremely emotional," Miller said in a video interview with PETA. "I think any mother knows the sense of protection and connection you have with your baby."
Of course, Miller isn't the first high-profile mama to use her bare bump for good: Alicia Keys was among those who came before her, posting a shot of her belly painted with a peace sign and the caption, "The #WeAreHere Movement begins today." That stunt was meant to galvanize her fans to support social justice causes.
The fact is, I respect anyone who uses their high profile in support of causes they believe in. And Miller and Keys were just two among the recent examples of compassionate mamas-to-be who took a pause from such an intense personal time to take a meaningful stand. What do you think?
Photos: Top; Instagram/MarisaMiller. Bottom; Courtesy of PETA