Which Hollywood stars have herpes? Sony hack reveals actors were asked if they had oral herpes to stop it spreading on set Newly-released documents show that Sony required actors to fill out a 'Cold Sore Questionnaire' to stop the spread of herpes One actor initially refused to answer the questions - sparking a flurry of emails - while one Academy-Award winner revealed she had cold sores Hollywood stars had to submit questionnaires detailing whether they had any cold sores in a bid to stop the spread of oral herpes on set, the latest Sony hack has revealed. Among the new documents released by Wikileaks this week was the 'Cold Sore Questionnaire' which Sony required actors to fill out in order to get insurance ahead of a film shoot, RadarOnline reported. A copy of the page-long questionnaire asks actors to detail the locations of their cold sore, the length of time their cold sores last and what they are triggered by. Scroll down to video Leaked: Another batch of documents leaked this week shows that Sony (pictured) asked actors to detail whether or not they had a cold sore and the length of time they usually suffered from them It also asks for a description of the medication they take and whether they use it during filming. But when faced with the questionnaire, not all actors were forthcoming with information, RadarOnline reported, citing email exchanges between execs. One of the actors for Aloha, which stars Bradley Cooper, Emma Stone, Rachel McAdams and Bill Murray, revealed they were taking medication for the sores. The insurance agent told Sony the actor - who was not one of the film's main stars - was using Abbreva to treat the condition and would need to prove they were taking it before and during filming 'as a preventative measure'. One top actor, who has not been identified, also initially refused to answer the questions, sparking a flurry of emails between the insurance company, Sony and his rep. One of the actors for Aloha, which stars Bradley Cooper, left, and Rachel McAdams, right, revealed they were taken medication for the sores. The actor was not one of the leads of the movie Another Academy Award-winning actress also revealed she suffered from the sores but agreed to take medication, Radar reported. Cold sores are caused by the herpes simplex virus and can be found in and around the mouth, as well as the nose, the cheeks and the fingers. The sores usually last seven to 10 days and form blisters that ooze before crusting over; they are contagious until they crust over completely, according to WebMD. They are usually transmitted by kissing an infected person or sharing eating utensils or towels with them.