United Kingdom, Dec. 21 -- Chris Pratt has revealed that seeing his son "fight for his life" led him to devote his life to God.

In 2012, the 46-year-old actor and his 49-year-old ex-wife, actress Anna Faris' boy, Jack, was born nine weeks prematurely and spent a month in intensive care, and the youngster's high-risk start to life made Chris feel "compelled" to talk about his faith - which stems from his childhood.

The Guardians of the Galaxy star - who has just been to Rome, where he filmed a documentary on St. Peter, and met Pope Leo - wrote in a personal essay for 70-year-old journalist Maria Shriver's The Sunday Paper: "I was baptised in a Catholic Church and have believed in God since childhood.

"I attended various religious instit...