Former supermodel Twiggy is set to become a grandmother twice in the space of two months.

The 1960s icon, real name Lesley Lawson, will experience double baby joy as her daughter Carly is expecting and her stepson Jason's partner is also pregnant.

Lawson says, "I can't wait! My stepson will become a dad in March and Carly's baby is due in May."

Carly is Lawson's daughter from her first marriage to Michael Witney, and Jason is the son of the star's current husband Leigh Lawson.