Pharrell Williams 'Happy' Song Will Help Write Children's Book

Writing his hit song "Happy," Pharrell Williams probably had no idea his material would also make for a great book for children.

It may not seem as an obvious choice for the Grammy Award-winning performer, but Putnam Books for Young readers definitely saw its potential to make kids "happy."

This pushed the publishing group to enter into an agreement with Williams to write four picture books, which will start with the one with the ex-NERD member's hit song.

Williams, who already won a total of 10 Grammy Awards that include two for writing "Happy," has already signed for the book deal, which aims to feature children celebrating what it means to be around the world, Billboard said.

"I'm humbled by the global success of 'Happy,' but especially in awe of the song's young fans," Williams said in a statement, according to USA Today.

"My collaboration with Penguin allows me to continue a dialogue with these children in a fresh, new way. We're both committed to feeding the curiosity of young minds with imagination," he reportedly added.

Putnam Publishing, which is actually a division of Penguin, also confirmed its plan to go ahead with the first printing of 250,000 copies of the book, which is expected to be released on Sept. 22.

Aside from being a composer and performer, Williams is also philanthropist and a coach on NBC's "The Voice." His work has been featured in other children's media, such as the movies "Despicable Me 2" and "Paddington."

He also reunited with his hip-hop trio N.E.R.D. to create multiple songs for "The SpongeBob Movie: Sponge Out of Water." He claims to be "one of SpongeBob's biggest fans," The Washington Post reported.

With "Happy!" as his first children's book, Williams will follow the footsteps of Bob Dylan, whose song "Blowin' in the Wind" was adapted into a children's book in 2011, illustrated by Caldecott Honor medalist Jon J. Muth.

"Happy!" has sold over 5 million copies, and it's still going strong, thanks to continued play on certain radio formats and Williams' electrifying performance at the recent Grammys.

Bob Marley's eldest daughter, Cedella Marley, adapted a few of her father's hits into children's books, including "Every Little Thing" and "One Love."

In 2014, Ringo transformed his song "Octopus's Garden" into a picture book, which was published last year and included an audio recording of Ringo reading the book.