Megan Gillespie Rice (born January 31, 1930) is an anti-nuclear activist and Roman Catholic nun of the Society of the Holy Child Jesus. On February 18, 2014, Rice was sentenced to 35 months in prison for breaking into the Y-12 National Security Complex in Oak Ridge, Tennessee, spray-painting antiwar slogans, and splashing blood on the outside of the heavily-guarded Highly Enriched Uranium Materials Facility.