Bradley Cooper is opening up about the death of his father -- admitting it changed everything in his life, and Breaking Celebrity News has details on his heartbreaking interview.

The Silver Linings Playbook star sat down with GQ magazine and spoke candidly about the loss of his beloved dad, Charles, and how 'privileged' he felt to be by his side when he passed away in 2011.

"Death became very real," Cooper said. "And very tangible. Because my father - someone who had been in my life for 36 years is just f**king gone. I watched him dying, and I was there by his bed watching him, breathing with him, and then I saw his