Credit: Mike Marsland/

Hollywood's baby boom continues!

Kimberly Stewart is pregnant with Benicio del Toro's baby, his rep confirms to

The 31-year-old actress, model and daughter of legendary rocker Rod Stewart, 66, is not in a relationship with the 44 year-old Oscar-winner.

"Benicio is the father and very supportive," his rep tells Us. "Although [he and Kimberly] are not a couple, they are looking forward to the arrival of the baby."