Maddox, Zahara, Shiloh, Pax, Knox and Vivienne One week after Angelina Jolie and Brad Pitt's 18-year-old daughter Shiloh filed to drop "Pitt" from her last name, a source close to Pitt tells PEOPLE that the father of six is "aware and upset" about the change.

Apparently, Brad Pitt isn’t too thrilled that his daughter, Shiloh, dropped his last name. PEOPLE reports that the actor wasn’t happy when he learned about the decision from the daughter he shared with his ex,

Pitt and Jolie, who met in 2003 while filming Mr. and Mrs. Smith, were married from 2014 to 2016 after being together for around 10 years. In addition to Shiloh, they share Maddox, 22, Zahara, 19, Pax,