Happy birthday, Lincoln!

Today Kailyn Lowry and Javi Marroquin's son turns three years old — and it feels like he was only born yesterday.

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Both Teen Mom 2 stars took to social media to mark the milestone.

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Big Papi and lil Papi 👨🏽👶🏽

A post shared by Javi Marroquin (@javim9) on

"My early mornings and long nights continue to be the best parts of my day. I love you Linc! HAPPY BIRTHDAY!" Javi says on Instagram.

Kail shared this adorable photo on Snapchat this morning, featuring her six-year-old son, Isaac, from her relationship with Jo Rivera.

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kailyn lowry snapchat

"Good morning birthday hugs," she writes.

Check out Lincoln's cutest moments in the gallery!