Helena Bonham Carter hired a psychic to contact the late Princess Margaret before playing her in The Crown.
The 52-year-old actress enlisted the help of a clairvoyant to speak to Queen Elizabeth's sister - who died in 2002 aged 71 - from beyond the grave to ensure she researched the role with "as much depth as possible".
A TV insider said: "She always likes to research her roles with as much depth as possible - and is always prepared to go that extra mile.
"So if that means using someone with supernatural powers to speak to a character who is now on the other side then Helena has no problems with doing that."
![Helena Bonham Carter takes over the role of Princess Margaret in season 3 of the hit Netflix show. Photo / Netflix](https://www.nzherald.co.nz/resizer/v2/OVQDDQDPKRRZZFVGWSC57C2IQI.jpg?auth=0ba45e8fbc5f3f3baced3e9872314c0e24de14579cc07dad89370ab93e4693ef&width=16&height=11&quality=70&smart=true)