The best-selling author E.L. James has collaborated with Swedish underwear label KappAhl to create a collection of lingerie based on her erotic romance novel, "Fifty Shades of Grey."

The designer firm said the items are full of references to the book's characters, including Christian Grey and Anastasia, which the roles will be played by Jamie Dornan and Dakota Johnson respectively in the film adaptation. The latest range includes bras, briefs, negligees, dressing gowns and even masks in either sexy black satin or elegant grey lace.

"It has been incredibly exciting and interesting to be involved in the process," E.L. James said of the new lingerie line. "From the production of the concept through the design to the final collection."

"I have been deeply involved at all stages, and my thoughts and suggestions are clearly visible in the collection's garments," she added.

In addition, the lingerie campaign features a plus-size woman and the garments are available in "a choice of materials and silhouettes to suit women of all shapes and sizes."

"Both E.L. James and KappAhl felt that it was important for all women to be able to feel comfortable and beautiful while wearing the garments," said Carina Ladow, vice president of range and design at KappAhl. "Not surprisingly, the garments come in shades of grey with complementary colors such as red and black. The garments are embellished with lace details for romantic feeling."

"We are always looking for new ways to interest our customers and this is the first time that KappAhl has entered into a collaboration of this type," she added. "It gives us an opportunity to offer our customers a feeling of luxury and frivolity in their everyday lives. The end result is better than we could have ever hoped and we are very happy with the enthusiasm and commitment shown by E.L. James."

The "Fifty Shades of Grey" movie is slated to hit theaters on February 15, 2015.