The 31-year-old actress was joined at the event by Dianna Agron, who also stars in the film.
Earlier that same week, Olivia revealed how motherhood helped her prepare for her role in her movie Meadowland.
“I think anyone who becomes a parent, their heart expands, and you empathize on a different level, and that’s what I think was required to tell this story as it should have been told,” Olivia told People.
