Larry Hagman's granddaughter has been dragged into a legal wrangle by the late star's estate executors over a set of missing jewels.

The Dallas star's lawyers claim Noel Hagman is refusing to hand over a valuable necklace and matching earring set encrusted with diamonds and emeralds, which once belonged to her grandfather's mother, actress Mary Martin.

In legal documents obtained by, Noel claims a family member gave her the gems as a gift, but according to the estate lawyers, no one in the clan can remember the gesture and they want the jewels back.

By law, if Hagman's granddaughter refuses to hand over the items she will have to pay the estate double their value for wrongfully holding on to property.