Lindsay Lohan 911 Call Prompts Union Investigation

Two unions visited the set of “Liz & Dick” in Marina del Rey this week to examine working conditions after Lindsay Lohan collapsed from exhaustion on .

A staff person at the Marina del Rey Ritz-Carlton called 911 when the actress was found unresponsive in her room. When paramedics arrived on the scene, they determined that nothing was wrong with Lohan and she was not taken to the hospital.

Lohan, 25, was just sleeping after working a "grueling schedule" which kept her on set from 7 p.m. until 8 a.m. before she checked into the Ritz-Carlton, according to publicist Steve Honig.

Union contracts limit the number hours actors and crew can work on movie sets. Both the Screen Actors Guild, which represents actors, and the International Alliance of Theatrical Stage Employees, which represents stage workers, visited the “Liz & Dick” set this week.

“We have thoroughly investigated this matter and our business representatives have visited, and will continue to visit, the set of Liz & Dick,” SAG-AFTRA said in a statement on Wednesday. “We have spoken with representatives from the company and they are fully aware of their contractual obligations. We will ensure that all applicable penalties will be paid.”

The IATSE visited the set after reports that two hairstylists became ill from exhaustion.

“The IATSE is on top of the situation on the set of Lifetime’s ‘Liz and Dick,’ ” IATSE Director Mike Miller said in a statement. “We have had union representatives on the set since last Friday and will continue to monitor the hours and working conditions there.”

Lohan returned to the set shortly after the June 15 incident.