The drama series "Atlantic Crossing" followed the flight of Crown Princess from Norway and her trip to the United States, where she became a key figure in the Washington political scene.
The series maker has worked on scripts for the series for seven years. Through extensive research, they have found unpublished material in the United States and Norway showing how Crown Princess supported Norway during World War II.
"So far, there is no room for women's influence in our story about World War II. Now it's open, said Sofia Helin.
For many Norwegian television viewers, Helin is known as Saga Noren on the Bridge. Now he works extensively to make his interpretation of Crown Princess Märtha, originally Swedish.
"I studied Norwegian and read everything I found from history books from World War II and the Norwegian and Swedish royal families.
Helin had been to the castle to learn about royal cutlery and etiquette.