Two controversial Catholic leaders will lead the Democratic National Convention in prayer before and after former Vice President Joe Biden speaks on Thursday.

The speakers, Rev. James Martin and Sister Simone Campbell, will pray for national unity under a Biden administration with a series of other faith leaders addressing the convention this week, according to a press release from the Democratic National Committee. The DNC announced the roster before a Sunday event during which members of many faith traditions called for social justice, greater care for the Earth, and a focus on racial healing.