Knox Jolie-Pitt shows off his fitness routine during energetic run in Los Angeles

Knox Jolie-Pitt is paying attention to his fitness. The youngest child of Angelina Jolie and Brad Pitt was photographed going on a solo run in Los Angeles, sweating and working hard for his health. RELATED: Angelina Jolie & son Knox bond over shopping – Actress on why her kids avoid fame Angelina Jolie and twins Vivienne and Knox Jolie-Pitt inseparable since divorce settlement: Their latest outing in LA Shiloh and Knox Jolie-Pitt join their mother in supporting victims of the LA fires Backgrid/The Grosby Group Knox Jolie-Pitt shows off fitness routine in Los Angeles Photographers . . .