When Amelia Gavin got an email two years ago asking if she’d be willing to be interviewed for a new documentary, she was skeptical — but immediately recognized the name the producer mentioned. “It was Gyllenhaal. I thought, well, could it be?” recalled Gavin, a UW associate professor of social work. Indeed it was. “In Utero” was written, produced and directed by Kathleen Man Gyllenhaal and Stephen Gyllenhaal, stepmother and father of famous siblings and actors Jake and Maggie. The UW is hosting a free, public screening of the film at 6 p.m. May 31 that includes a Q&A with Gavin, UW senior lecturer in health services and global health Dr. Stephen Bezruchka and Dr. Gabor Maté, a best-selling author and expert on addiction and child development from Vancouver, British Columbia.