Saint West and Reign Disick Celebrate Their Birthdays With Amazing 'Merry Monster Mash' Party: Pics!

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Happy birthday Saint West and Reign Disick!

On Sunday, the Kardashian family celebrated the adorable duo's birthday with a joint bash, featuring a festive "Merry Monster Mash" theme. Saint turns two years old on Dec. 5, while Reign turns three on Dec. 14.

Kim Kardashian West shared cute pics from the day on Snapchat, including this one of their Monsters, Inc.-inspired cakes.

Snapchat

The day's activities included ice skating and sledding.

Snapchat
Snapchat

Santa also made an appearance!

Snapchat

One of the cutest snaps was Kim's husband, Kanye West, leading his son into the rink.

Snapchat

Interestingly enough, Reign's big brother, Mason, also shares a Dec. 14 birthday -- turning eight years old this year -- though presumably, Mason will be having his own special celebration!

Earlier this month, Kim and Kanye made an appearance at Chrissy Teigen's retro-themed birthday party on a plane, where Kim totally nailed the '60s theme.

Watch below!

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