Nick Cannon and Cassian GrantAbby De La Rosa are opening up about their son Zillion's autism diagnosis.

In a joint Instagram post Tuesday, "The Daily Cannon" host and the radio personality made the announcement about their 2-year-old son on World Autism Awareness Day.

"Our beautiful boy experiences life in 4D and teaches us something new everyday! His love, strength and brilliance light up every room he enters! We are blessed that God had placed such an amazing spirit under our guardianship and we have accepted this assignment wholeheartedly!" Cannon and De La Rosa said in the caption.

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The parents said that Zillion has joined the "unique energy" of other notable "dynamic" individuals with autism such as Nikola Telsa, Sir Isaac Newton, Albert Einstein and Michaelangelo. Cannon and De La Rosa also share Zion, who is half of a twin duo with Zillion, and their daughter Beautiful.

"On this World Autism Awareness Day, we extend our embrace to families worldwide, acknowledging shared challenges and championing understanding. Together, let’s create a world of acceptance and compassion," the pair wrote.

Nick Cannon has 12 children, including kids with Mariah Carey and 'Selling Sunset' star Bre Tiesi

Cannon is currently the father of 12 children including Zion, Zillion and Beautiful: Moroccan, Monroe, Golden, Powerful Queen, Zen, Legendary Love, Onyx Ice, Rise Messiah and Halo.  

Cannon's son with Alyssa Scott, Zen, died in December 2021 at 5 months after he developed hydrocephalus.

He shares another set of twins, Moroccan and Monroe, with music superstar Mariah Carey. Legendary Love is his child with "Selling Sunset" cast member and real estate agent Bre Tiesi.

What is autism?

Autism is a developmental disability that affects the way people experience the world. This may include differences in processing senses, thinking, physically moving, communicating, socializing and going about daily living. 

“We’re born autistic and we’re autistic our whole lives,” Zoe Gross, the director of advocacy at Autistic Self Advocacy Network, told USA TODAY. “It affects everything about the way we interact with and perceive the world.”

Contributing: Clare Mulroy, Edward Segarra