How Did Raz B’s Baby Die? B2K Singer’s 3-Month-Old Son Astro Monte Thornton Dies Suddenly

B2K singer Raz B and his wife, Mona Li, are mourning the sudden death of their 3-month-old son, Astro Monte Thornton, with the cause and manner of death still under investigation.

Astro died unexpectedly earlier this week, according to reports on Friday. The Fulton County Medical Examiner’s Office has since completed an autopsy, but authorities have not determined what caused the infant’s death.

The news was announced by a spokesperson for the family, who asked for privacy as Raz B and Li grieve the loss of their youngest child.

“It is with heavy hearts that we announce the unexpected passing of Astro Monte Thornton,” the statement said, identifying him as the beloved son of Mona and De’Mario “Raz B” Thornton.

Who Was Astro Monte Thornton?

Astro Monte Thornton was the youngest son of Raz B and Mona Li. The couple welcomed him in May 2026, with Raz B sharing the news of his arrival on social media. At the time, the singer celebrated Astro as the newest addition to the Thornton family.

The couple also has an older son, Versai Carter Thornton, who was born in October 2024. Li has a daughter from a previous relationship.

For Father’s Day, Raz B and Li posted family photographs that included their infant son. The couple’s social-media posts showed Astro as part of a growing family that had welcomed him only weeks earlier.

Who Is Raz B?

Raz B, whose real name is De’Mario Monte Thornton, is best known as a founding member of the R&B group B2K.

The group became prominent in the early 2000s and included Omarion, Lil’ Fizz and J-Boog. B2K later separated, and Raz B pursued a solo career. In recent years, he has continued performing and has also focused on his family and other entertainment projects.

Who Is Mona Li, Raz B’s Wife?

Mona Li is Raz B’s wife and the mother of Astro and their older son, Versai. Li had publicly documented her pregnancy earlier this year, including a post celebrating Raz B as he completed his tour while she was nine months pregnant.