'Inferno' producers add Lindsay Lohan 'sobriety clause'

Producers of Lindsay Lohan's new flick Inferno are adding a "sobriety clause" to the actress' contract to ensure she behaves herself on set.

Movie bosses behind the new Linda Lovelace biopic vowed to stand by the star as she battled her personal issues.

However, the November start date has been thrown into jeopardy after Lohan failed two mandatory drug tests.

She is due back in court on Friday and is reportedly facing another stint in jail.

Inferno producer Chris Hanley has now revealed movie bosses are determined to make sure Lohan stays out of trouble when she finally begins filming the role and they have made sure her contract now contains a specific "sobriety clause".

"Formally, the terms of the acting services agreement would be such that Lindsay would not violate any obligation she would have to fulfil with the court, with her probation, or with the production insurance," the Daily Star quoted Hanley as telling E! News.

"Informally, as far as I am concerned that would include being 100% sober, yes. The actual contractual wording would be more legal to include making sure the movie production would not be compromised in any way," he said.