Saint West, Rob Kardashian

Instagram

Kim Kardashian shared an adorable moment with her eldest son, Saint West.

On Wednesday night, the Keeping Up With the Kardashians star took to her Instagram Story to post a video of Saint holding up a mask of Rob Kardashian. In the sweet post, Saint pretends to be his uncle as he places the mask in front of his own face.

"I'm uncle Robbie, what's your name?" Saint, 3, can be heard saying in the fun Instagram Story video.

"What?" Kim replies as Saint then pokes his head out from behind the mask. "It's you?! I thought you were uncle Robbie!"

Kim then tells a giggling Saint, "You tricked me!"

It's a very exciting time for the West family. On May 9, Kimye welcomed their fourth child, a baby boy, via a surrogate.

"He's here and he's perfect!" Kim tweeted, announcing her son's arrival. According to the E! star's rep, the baby boy weighed in at six pounds and nine ounces.

This cute video of Saint comes about eight months after Kim posted a series of photos of her eldest son with a Kanye West mask.

"Guess who," Kim captioned the posts of Saint, adding a laughing emoji.

You can see more of Saint's cutest moments HERE!

Kanye West, Saint West

David Banks/Getty Images

Saint West

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Chicago West, Saint West

Kim Kardashian/Instagram

Saint West

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Saint West, Kim Kardashian

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Kim Kardashian, North West, Saint West, Chicago West

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Saint West, Chicago West

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Saint West, Kim Kardashian

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Kim Kardashian, Kanye West, North West, Saint West

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Kim Kardashian, Saint West, 2017 Kardashian Christmas Card Sneak Peek

Eli Linnetz/kimkardashianwest.com

Saint West, Car Seat

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Saint West

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Kim Kardashian, Kanye West, North West, Saint West, 2 Chainz, Wife, Kids, Family, Pre-Fourth of July

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Saint West, Instagram

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Saint West, Instagram

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Saint West, Instagram

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Saint West, Instagram

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Kim Kardashian, Kanye West, North West, Saint West

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Kanye West, Kim Kardashian, Saint, North

Courtesy: John & Joseph Photography Inc.

Saint West, Kim Kardashian

Courtesy Kim Kardashian West

Saint West, North West

Kim Kardashian West

Saint West

Saint West, Kim Kardashian Snapchat

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Saint West, Kim Kardashian, Snapchat

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Saint West

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Saint West, Kim Kardashian West Twitter

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Saint West

kimkardashianwest.com

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