The outing marks the first time the couple steps out together since revealing they were expecting a third child on the pair's reality show Keeping Up With The Kardashians.
Disick and Kardashian, 35, were all smiles as they posed for photos at the event. Disick looked casual in black jeans, a grey tee and a plaid shirt, while Kardashian showed off her growing baby bump in a white lace jumper.
Kardashian and her sister Khloe have taken up residency in The Hamptons while they film Kourtney & Khloe Take The Hamptons, an upcoming spin-off of the family's reality show, KUWTK. Kardashian famously kicked Disick out of her rental home in June because of his out-of-control drinking. The businessman has reportedly vowed to stay away from alcohol until Kardashian gives birth.
Disick and Kardashian are already parents to Mason Dash Disick born in December 2009 and Penelope Scotland Disick born in July 2012. Kardashian confirmed her third pregnancy on the
ninth season premiere of KUWTK in early June. She's reportedly due in December.