Keira Knightley has filed a harassment complaint against a man who disrupted her Broadway debut last week.

The 30-year-old actress was forced to halt her performance in 'Therese Raquin' at Studio 54 in New York on October 1 just minutes into the first act after Landon Rust stood up, approached the stage and began declaring his love for her and she was left particularly alarmed when he said: ''We're going to be in heaven together.''

A source told the New York Post newspaper's Page Six column:

''She was scared. She wanted to document the incident to start a paper trail in case this guy turns into a stalker.

''If he starts following her around and showing up where she is, then she can get an order of protection against him, but only with a paper trail.''

Following the incident at the theatre, Rust - who also threw a bouquet of roses to the 'Pirates of the Caribbean' actress - was escorted out of the theatre in handcuffs, issued a summons for disorderly conduct, and released.

Kiera - who has four-month-old daughter Edie with husband James Righton - filed her police report the following day.