Serena Williams and Ciara teach their daughters French greetings while swimming in pool in Cannes

Serena Williams and Ciara arranged a playdate for their little daughters while both families were in Cannes.

In a video Ciara posted to Instagram on Friday, she held her little girl Sienna, two, and Serena cradled her one-year-old Olympia as they all floated in a swimming pool.

Ciara and Serena could be seen teaching their children to say: 'Bonjour!' and: 'A bientot!' while smiling and waving at the woman behind the camera.

So sweet: In an Instagram video Ciara posted Friday, she held her little girl Sienna, two, and Serena Williams cradled her one-year-old Olympia as they all floated in a swimming pool

So sweet: In an Instagram video Ciara posted Friday, she held her little girl Sienna, two, and Serena Williams cradled her one-year-old Olympia as they all floated in a swimming pool

'The moments I cherish. @serenawilliams and I with our girls in Cannes. #SweetMemories #MomLife,' Ciara captioned.

Ciara shares Sienna with her husband Russell Wilson and a five-year-old son called Future with her ex-fiance, a rapper also called Future.

Russell and Ciara married at Peckforton Castle in Cheshire three summers ago and will celebrate their anniversary on July 6.

Greetings: Ciara and Serena could be seen teaching their children to say: 'Bonjour!' and 'A bientot!' while smiling and waving at the woman behind the camera

Greetings: Ciara and Serena could be seen teaching their children to say: 'Bonjour!' and 'A bientot!' while smiling and waving at the woman behind the camera

'With our girls': Ciara revealed in the caption that the video was taken 'in Cannes' and that these are 'The moments I cherish'

'With our girls': Ciara revealed in the caption that the video was taken 'in Cannes' and that these are 'The moments I cherish' 

Serena and her hubby, Reddit co-founder Alexis Ohanian, had a star-studded New Orleans wedding in 2017 with a guest list including Beyonce and Anna Wintour.

The lovebirds confiscated their guests' phones for the ceremony - a leaf Priyanka Chopra took from their book for her wedding to Nick Jonas last year.

Serena welcomed baby Alexis Olympia Ohanian in September of 2017, a couple of months before the wedding, but suffered a series of medical issues in the aftermath.

Family matters: Ciara shares Sienna with her husband Russell Wilson and a five-year-old son called Future with her ex-fiance, a rapper also called Future

Family matters: Ciara shares Sienna with her husband Russell Wilson and a five-year-old son called Future with her ex-fiance, a rapper also called Future

History: Russell and Ciara married at Peckforton Castle in Cheshire three summers ago and will celebrate their anniversary on July 6

History: Russell and Ciara married at Peckforton Castle in Cheshire three summers ago and will celebrate their anniversary on July 6

After an emergency C-section, Serena had a pulmonary embolism that caused multiple other problems, leaving her bedridden for a month and a half.

'Sometimes I get really down and feel like, Man, I can’t do this. It’s that same negative attitude I have on the court sometimes. I guess that’s just who I am,' the sister of Venus Williams explained to Vogue of that time.

Serena and her sister Venus Williams are both tennis superstars, while the dashing Russell is the quarterback of the Seattle Seahawks.

Terrific: Serena and her hubby, Reddit co-founder Alexis Ohanian, had a star-studded New Orleans wedding in 2017 with a guest list including Beyonce and Anna Wintour

Terrific: Serena and her hubby, Reddit co-founder Alexis Ohanian, had a star-studded New Orleans wedding in 2017 with a guest list including Beyonce and Anna Wintour

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Serena Williams and Ciara teach their daughters French greetings while swimming in pool in Cannes

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