Lindsay Lohan made the audience laugh, but not for the right reasons.

The controversial star made her debut performance in David Mamet's well-loved play "Speed-the-Plow" in London amidst a half-filled theater and monumentally bombed.

"Speed-the-Plow", which first hit the stage in 1988, is a satirical take on the movie industry from the point-of-view of two cunningly sly studio executives.

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Lohan plays Karen, the seemingly innocent assistant of one of the executives who might actually be more than what she appears.

Reportedly, the actress was so out of it, forgetting her lines, jittery and unprepared for a line performance. What was worse was that Lohan carried a book as a prop that had her dialogue and would glance at it every so often when she would forget her lines.

Lohan was said to have looked extremely pale and nervous during the performance, while the audience couldn't help but giggle at lines that the actress unintentionally forgot.

According to an article printed in the New York Daily News, "Lohan managed to hang on through her small but critical role as Hollywood secretary Karen - but only with the aid of some crew members offstage who shouted lines at her when she blanked on what she was supposed to say. She also seemed to rely on a book she clutched as a prop that had some lines from the script scribbled in it."

However, critics didn't consider Lohan's performance as a "car crash". They maintain that if the actress shapes up and prepares for her role for the next performances, she may just be able to pull off the role much better.

Apparently, Lohan wasn't the only one to have had trouble with her lines. Minutes before the play started, veteran Richard Schiff called out to stagehands for help with his lines.

British actor Nigel Lindsay was the only person in the three-person cast to have had his lines and acting down pat.

The production for "Speed-the-Plow" will run until November 29.