An anti-Scientology group plans to stage a protest when Katie Holmes takes to the stage for her Broadway debut next month (Oct08).
The former Dawson's Creek star is due to begin her run in Arthur Miller's All My Sons at New York's Gerald Schoenfeld Theatre on 16 October (08).
But it is feared her opening night will be marred by protests from the Anonymous campaign group - whose members plan on picketing the theatre in protest against the controversial religion.
Holmes - who was raised as a Roman Catholic - converted to Scientology after meeting her husband Tom Cruise.
A spokesperson for the group tells MSNBC.com that the protest will go ahead, adding: "We aren't looking to shut it (All My Sons) down, we don't have the power to do that, we just want to prove a point.
We want to draw attention to Scientology, and hopefully get Katie out of it before it's too late.
The Anonymous group is known for the faceless masks worn by members, and recently picketed the Scientology Centre in New York.