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Dylan Dreyer's baby boy Calvin wakes up with a big smile in adorable video

/ Source: TODAY

Some people get up with a groan; others wake up ready to start the day. And then there's Dylan Dreyer's son Calvin.

He may only be 4 months old, but this wee one is already the ultimate morning person.

Calvin not only rises with the sun, he gives it a little competition with his big beaming smile.

RELATED: Dylan Dreyer talks motherhood and baby Calvin on TODAY: It's the 'ultimate joy'

On Tuesday morning, Dylan shared an adorable video of her baby's rise-and-shine routine.

"If only we could all wake up like this!" she wrote.

In the clip, Dylan's husband, Brian Fichera, unswaddles Calvin after a good night's sleep and what follows is a lengthy expression of pure joy.

Delighting over dad's voice, raising his tiny arms to greet the day and grinning ear-to-ear — Calvin does it all.

Of course, this isn't the first time we've seen a smile like that.

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Calvin celebrated his very first Easter with a similar expression.

And that family portrait shows where he gets his grin from!