Kirk Douglas and Tony Curtis starred together in the 1958 film "The Vikings," and their relationship during filming was somewhat tumultuous. Despite their on-screen camaraderie, they had a complicated off-screen dynamic. Douglas was known for his strong personality, while Curtis often felt overshadowed by his co-star's presence. In later interviews, both actors acknowledged their differences but also expressed mutual respect for each other's talents. Ultimately, their professional relationship was marked by a mix of rivalry and camaraderie typical of many Hollywood partnerships.

The 1958 movie "The Vikings," directed by Richard Fleischer, was primarily filmed in various locations in the United Kingdom. Key filming sites included the scenic landscapes of Norway, particularly around the fjords, along with locations in the Isle of Man. The production utilized the striking natural scenery to depict the Viking era, enhancing the film's authenticity and visual appeal.

"The Vikings," released in 1958, is a historical adventure film that draws inspiration from Norse history and Viking culture, but it is not strictly based on a true story. The film features fictionalized characters and events, blending historical elements with creative storytelling. While it captures the essence of Viking life and their seafaring exploits, the plot and characters, including the rivalry between the brothers and their quest for power, are largely dramatized for entertainment purposes.

In the 1958 film "The Vikings," Ragnar is portrayed by actor Ernest Borgnine. He is depicted as a fierce and powerful Viking chieftain, known for his strength and leadership. The character is central to the plot, which revolves around the Viking raids and the conflicts between the Norsemen and the English. Ragnar's ambitions and interactions with other characters, including his son Einar, played by Kirk Douglas, drive much of the film's drama and action. The film is a classic depiction of Viking culture and mythology.