"This film shows us that no matter how desperate we are or how serious our circumstances through Mary there is hope -- hope in Christ," Gallagher said.
The film's director, Campbell Miller, said that Ireland and the world need this sense of hope "now more than ever."
"We hope to give the young people who get a chance to watch this [the message] that there is a sense of hope, that things can get better," Miller told EWTN News.
A statue of Our Lady of Knock was present on the altar of St. Peter's Basilica for the papal Mass for the Sunday of the Word of God on Jan. 26.
The rector of Knock Shrine, Fr. Richard Gibbons, traveled to Rome for the Mass and attended the Vatican premiere of the film Jan. 27.
"The Word of God is important in the apparition," Gibbons told EWTN, noting that St. John appeared preaching the word of God, alongside Mary, in the apparition at Knock.
The Irish priest also highlighted the Eucharistic message of the apparition, in which a lamb appeared on top of an altar and in front of a cross.
"The message is Eucharistic .... the Mass is so important. During the penal times, the persecution of Catholics in Ireland, there was a saying, in Irish. The saying was 'For the Irish, it is the Mass that matters.' So the Mass maintained the faith of the people during very, very bad times in terms of our faith," he said.
The film also tells the story of a miraculous healing involving Eucharistic adoration that occured at Knock Shrine in 1989 and was officially recognized in Sept. 2019.
Marion Carroll, a woman who had been bedridden for years with multiple sclerosis, was healed during a blessing with a monstrance at Knock Shrine.
Fr. Gibbons said that the Knock Shrine, built on the site of the 1879 apparition, is a place where many people find spiritual healing and peace by reencountering the sacraments.
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On average, 4,000 confessions take place each week at the shrine.
"At Knock people come to confession all the time. I call it our engine room -- that's where the miracles happen and the dynamic happens -- in the confessional," Gibbons said. "People that come to Knock wouldn't even think about going to confession, but they see others going ... it gives them such peace and hope and joy that they in turn then speak that to other people."
"It is a place of hope, a place of peace, and a place of reconciliation. That is what Knock offers to people," Fr. Gibbons said.