is pregnant with Benicio del Toro's baby.
The blonde socialite - the daughter of singer Rod Stewart
- is expecting a child with 'The Wolfman' star, but the pair are not in a relationship.
The actor's representative Robin Baum confirmed the news to Life & Style magazine, saying: "Kimberly is pregnant. Benicio is the father and is very supportive. Although they are not a couple, they are looking forward to the arrival of the baby."
It is not known when 31-year-old Kimberly and Benicio, 44, were dating.
The new arrival will be Rod's first grandchild.
The 66-year-old musician recently welcomed his eighth child, Aiden, into the world in February, his second son with wife Penny Lancaster, 40.
Kimberly was most recently romantically linked to Jude Law
and Rhys Ifans, while Benicio was once rumoured to have had a brief relationship
with Scarlett Johansson.