There was plenty of pre-game partying among Cowboys fans long before Dallas defeated the Cleveland Browns 33-17 in their season opener on Sunday.

While the wives of Cowboys stars Zack Martin, Dakoda Shepley and DeMarcus Lawrence were getting their make-ups done by celebrity makeup artist Allison Kaye before kickoff, news of Dak Prescott’s massive $240 million contract extension was announced. The trio of Morgan Martin, Sloan Shepley and Sasha Lawrence celebrated with a congratulatory FaceTime call to the quarterback’s biggest supporter: girlfriend Sarah Jane Ramos.

“The girls I was glamming up found out about Dak’s extension while they were sitting in my chair. They were freaking out, so excited and so happy for him and immediately FaceTimed Sarah Jane to celebrate the news,” Kaye exclusively told The Post.

“It was so nice to see how happy they were and it made them even more excited for the competition.”

For the Cowboys’ season opener in Cleveland, Kaye — who has created stunning game-day looks for the wives of Chiefs stars, “Bachelor” alumna Hannah Ann Sluss and more — used Beauty Pie SPF, moisturizer and a lip mask “to prep the girls’ skin” before applying mascara, eye shadow, lip products and setting spray from LA Girl cosmetics to create “a long-lasting game-day look.”

“The girls looked amazing,” said Kaye, who said the ladies were “customizing their outfits” with their husbands’ numbers on the back.

“They said, ‘This is going to be the best game ever!’”