Kourtney Kardashian pregnant with third child, report says

Is Kourtney Kardashian expecting her third child with boyfriend Scott Disick?

Us Weekly said Wednesday that the eldest of the reality-TV Kardashian siblings -- who is summering on Long Island with youngest sister Khloé as they shoot their E! series "Kourtney & Khloé Take the Hamptons" -- is a few months along on a planned pregnancy. Los Angeles-born Kourtney Kardashian, 35, and Disick, 31, originally of Eastport, already are the parents of son Mason, 4, and daughter Penelope, 23 months. The couple has been together seven years, said E!, and have indicated no plans for a formal union.

Us said the child is due in December and that the parents do not yet know the gender.

Following the magazine's report, E! said that "neither Kourtney nor Scott have commented to confirm or deny the reports" and that Kourtney Kardashian "is expected to address the pregnancy rumors" Sunday on the season premiere of the flagship show "Keeping Up With the Kardashians."

The network said that Kourtney and Khloé Kardashian and Disick were sharing a Hamptons beach house during production of the two sisters' new show, and that the sibling stars had lunch earlier this week at restaurateur Zach Erdem's 75 Main in Southampton. The series focuses on the sisters opening a pop-up store, their first, in the Hamptons, while separately trying to relocate their Dash boutique from Spring Street in Manhattan's SoHo to a location elsewhere.