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Oh baby!

Kourtney Kardashian is pregnant with her third child, reports Us Weekly.

We thought that the 35-year-old might have a bun in the oven since it looked like she was wearing a maternity top when she arrived to the Hamptons to begin filming her new E! reality show with sister Khloe. Kourtney and Khloe are currently in Long Island, shooting their latest spin-off reality show, Kourtney & Khloe Take the Hamptons, where they are opening two more Dash stores.

"She is only a few months along," said an insider. "It was planned," another source told the mag. "[Kourtney] wants to have a handful of kids."

Looks like Kourt is following in the footsteps of big mama Kris Jenner. Kourtney and her main man Scott have two other children together, Mason, 4, and daughter, Penelope, 23 months.