The 50-year-old posed completely nude in a new photo shoot and posted two behind-the-scenes images on her Instagram account.
The mother-of-one, who is seen perching on a stool among a stack of cardboard boxes, captioned the photo: “Boxing Helena .. Worked with the amazing @aleburset on an exciting book project - here’s a few BTS shots #interningatfedex.”
The Danish beauty started her modeling career after she won the Miss Universe Denmark crown in 1986 when she was just 17 years old.
She went on to compete in the Look of the Year in 1987 and was a finalist.
Christensen went on to become one of the most in-demand models in the world in the ‘90s – her resume includes campaigns and runway shows for Chanel, Prada, Victoria’s Secret and Valentino.