It is believed the news will likely upset Diana's sons, William and Harry, the latter in particular who has recently worked with the streaming platform on a Thomas the Tank Engine 75th anniversary special. He and wife Meghan are reportedly in the midst of planning future projects too.
"The royals will refuse to take part as will the Spencer family," a source told The Sun.
"William and Harry will be very upset and angry. It's particularly distressing for Harry because he's been working with Netflix."
DSP however has defended the controversial project.
"This is a not a commissioned show and everything within the treatment is already in the public domain," said a spokeswoman for Endemol Shine, the parent company for DSP.
The series will use unseen footage from Diana's speeches in 1990-92 and interviews with people close to her to focus on her inner turmoil just before she and Charles officially split.
WHERE TO GET HELP:
If you are worried about your or someone else's mental health, the best place to get help is your GP or local mental health provider. However, if you or someone else is in danger or endangering others, call police immediately on 111.
OR IF YOU NEED TO TALK TO SOMEONE ELSE:
• 0800 543 354 (0800 LIFELINE) or free text 4357 (HELP) (available 24/7)
• https://www.lifeline.org.nz/services/suicide-crisis-helpline
• YOUTHLINE: 0800 376 633
• NEED TO TALK? Free call or text 1737 (available 24/7)
• KIDSLINE: 0800 543 754 (available 24/7)
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