Updated

An openly transgender Episcopal priest is set to preach at Washington National Cathedral.

The Rev. Dr. Cameron Partridge, the Episcopal chaplain at Boston University, will be a guest preacher on Sunday. He'll be the first openly transgender priest to preach from Canterbury Pulpit at the cathedral.

The Right Rev. Gene Robinson, the first openly gay Episcopal bishop, will preside at the service. It's part of the cathedral's celebration of LGBT pride month.

The service will also include readings and prayers from members of the lesbian, gay, bisexual and transgender community.

The Very Rev. Gary Hall, dean of the cathedral, says he hopes Partridge's appearance "will send a symbolic message in support of greater equality for the transgender community."