Knox Jolie-Pitt is one of the six children of actors Angelina Jolie and Brad Pitt. He was born on July 12, 2008, in Nice, France, along with his twin sister Vivienne.

To answer the question of whether Knox Jolie-Pitt is biological, the answer is yes. Knox Jolie-Pitt is the biological child of Angelina Jolie and Brad Pitt. Jolie and Pitt were in a long-term relationship, and they welcomed their first biological child, daughter Shiloh, in 2006. They went on to adopt children from different countries and also had biological twins, Knox and Vivienne.
The Jolie-Pitt family has been in the public eye since the couple first got together in 2005. Their relationship, marriage, and eventual separation have been widely covered by the media. While there have been rumors and speculation about the Jolie-Pitt children’s biological and adoptive status, there is no evidence to suggest that Knox Jolie-Pitt is anything other than the biological child of Jolie and Pitt.
Jolie and Pitt have always been very private about their personal lives and their children. They have been vocal about their commitment to their family, and have worked hard to provide a stable and loving environment for their children. While the family has faced challenges, including the high-profile divorce and custody battle between Jolie and Pitt, they have remained focused on their children’s well-being.
In conclusion, Knox Jolie-Pitt is the biological child of Angelina Jolie and Brad Pitt. While the Jolie-Pitt family has been subject to much media attention and speculation, there is no evidence to suggest that Knox’s biological status is anything other than that of the couple’s biological child.