Twin media moguls Mary-Kate and Ashley Olsen disappointed fans hoping for photos at a recent book signing - after a long list of strict demands were posted by the pair.

Fans lined up for signed copies of the 22-year-olds' new coffee table book Influence, but were taken aback by the nine-point list they were asked to abide by before greeting the stars - including a "no pictures" rule.

The form warned: "Mary-Kate Olsen and Ashley Olsen will be with us for a limited time. They will only be signing copies of their book... They will not be speaking, reading or taking questions.

"(The Olsens) will not sign any memorabilia or product other than Influence. There is a limit of one book per person.

"There is no photography allowed. You must put away your camera or cellphone before approaching the signing table."