Kourtney Kardashian rocked a loose, printed dress in the Hamptons on June 4, hours after Us Weekly exclusively broke news of her third pregnancy Credit: PacificCoastNews

Keep 'em guessing, Kourt! Kourtney Kardashian left a lot to the imagination when she stepped out wearing a loose, colorful dress on Wednesday, June 4, just hours after Us Weekly exclusively revealed that the Keeping Up With the Kardashians star is pregnant and expecting her third child with longtime love Scott Disick.

The 35-year-old mom-to-be looked boho-chic in the Sava Dress by Tolani, which concealed all but the tiniest hint of a baby bump. She paired the short, breezy number with knee-high Aphrodite gladiator sandals by Stuart Weitzman and a beige purse.

Later in the day, the reality star opted for a more casual look, rocking light-blue skinny jeans and a blue-plaid oxford shirt. She appeared to be in good spirits as she joined friends for dinner in the Hamptons, where she's currently filming the KUWTK spinoff Kourtney & Khloe Take the Hamptons.

As Us exclusively reported earlier on June 4, Kardashian and Disick will welcome their third child in December. Together for seven years, the couple are already parents to son Mason, 4, and daughter Penelope, 23 months. 

"It was planned," an insider told Us of the pregnancy. "[Kourtney] wants to have a handful of kids."

For more on the star's baby joy, pick up the new issue of Us Weekly, on stands Friday.