Keira Knightley's Broadway Debut Was Interrupted by a Screaming Fan

There will be added security going forward.

ByABC News
October 2, 2015, 1:21 PM

— -- A Broadway theater will add extra security starting with tonight’s performance of "Therese Raquin" after an audience member interrupted last night’s opening night performance to scream at star Keira Knightley, theater officials said today.

Knightley, 30, is currently appearing in "Therese Raquin."

“Roundabout takes the safety of their actors and audiences very seriously and extra security will be added beginning tonight," the company that operates Studio 54, where the show is playing, said in a statement. "For obvious reasons, we cannot comment on the exact nature of the additional security measures.”

During last night's performance, a man in the audience rose from his seat in the mezzanine, stood at the railing and starting shouting, a source told ABC News.

When Knightley did not respond, the man yelled, “Five seconds is too long to wait for a response!" according to the source.

An usher escorted the man away but as security personnel arrived, the guy picked up a bouquet of flowers and threw them at the actors, the source said. The man was detained by the NYPD.

The man has not been arrested and was taken to a hospital for mental evaluation, a police source told ABC News.