Lynch is an ambassador for J. K. Rowling's charity Lumos. In 2016, Lynch and her "Harry Potter" co-star and fellow Lumos ambassador Bonnie Wright, travelled to Haiti to learn about why there are 30,000 children living in orphanages, and met children who had been rescued from terrible conditions and reunited with their families. Lynch stated about charity work for children and families, "Without families and without love, children can’t be children. The most important thing as a child is to be with your family. And you have to do everything you can to keep that family unit in place."