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Laughing baby, four months later: Still laughing!

Laughing baby is back... and he's still laughing!Micah and his family skyrocketed to YouTube and TODAY stardom in March after dad Marcus posted a video of the baby laughing hysterically while dad ripped up rejection letters. It was the first video Marcus had ever posted, and more than 23 million people watched it!"I am always pleasantly surprised that so many people find such joy in Micah's laugh,

Laughing baby is back... and he's still laughing!

Micah and his family skyrocketed to YouTube and TODAY stardom in March after dad Marcus posted a video of the baby laughing hysterically while dad ripped up rejection letters. It was the first video Marcus had ever posted, and more than 23 million people watched it!

"I am always pleasantly surprised that so many people find such joy in Micah's laugh," Marcus McArthur told TODAY. "The best part of this entire experience has been reading viewers' feedback saying how his videos have helped lift their spirits during difficult times, like trying to find a job!"

Dad is finishing up his PhD and still looking for a job as a college professor of American history; but in the meantime, he's keeping busy finding new ways to make Micah laugh. Current favorite for the now-14-month-old: Dropping books on the floor.

Their newest giggly video was featured on Kathie Lee and Hoda, and mom and dad took that opportunity to spring a surprise on the rest of their family: They're expecting another baby! Congratulations -- hopefully his little brother or sister will follow in Micah's cheerful footsteps.

Related: Dad reveals story behing 'laughing baby' viral video

Here's their first TODAY show appearance:

How do you make your child laugh these days?