Pratt, who found out of his father's passing while filming Jurassic World, says it wasn't until he began filming Guardians of the Galaxy: Vol. 2 that he forced himself to fully digest his feelings.
"The truth is I ripped open some wounds that had been healing for some time," Pratt said in an interview with British GQ, which hits newsstands on Dec. 5.
"And I didn't want to. But I knew it was right for the moment...There are wounds that are never going to be totally healed," he continued. "It would probably make for a better story if it was some emotional thing that I hadn't dealt with."
"When we face the death of a parent, you sometimes feel regret that you didn't fully embrace what you had," he added.
In a previous interview withGQ last year, Pratt explained why he decided not to openly talk about his father's death.
"I knew being the lead in the movie that I was really responsible for everybody’s attitude, and so I compartmentalized it all and dealt with it in my own way, but not openly for people to see," he said. "I got pretty angry and got drunk and almost got in a fight with a drug dealer outside of my hotel room."
"He was a hard worker," he gushed. "My brother and I talk about it. Part of us appreciate that he made us tough, you know, through sort of emotional scarification."