The stunning duo were with the rest of the Team USA Wags while their other halves played their first official practice round at Le Golf National.
There was doubt Gretzky, 29, would make it to France after SunSport revealed her engagement to the world No 1 was in trouble.
Johnson was said to have struck up a friendship with brunette socialist Yassie Safai – but she denied the claims.
And Johnson confirmed he and Paulina, mother to his two children Tatum, three, and River, one, were committed to being a family.
Gretzky flew over with the rest of the US team on Sunday night and joined the other glamorous Wags today.
Their soiree included a trip to a Christian Dior shop and a boat tour in front of the Eiffel Tower.
Sims and Gretzky were joined by Europe star Jon Rahm's girlfriend Kelley Cahill.
She was one of the group of Team Europe Wags who also made it out for their day around the French capital.
The ladies will be beside their men for Thursday evening's Opening Ceremony.
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