Kevin Costner Asking God for a Miracle for Bobbi Kristina Brown Costner has long been close with the Houston family.

 -- Kevin Costner is asking God for a miracle as Bobbi Kristina Brown remains hospitalized on the eve of the anniversary of her mother Whitney Houston’s death.

“I hope that God opens her eyes and lets her breathe and lets her brain work, and she gets a second chance,” Costner said in an interview with “Nightline” co-anchor Juju Chang last Friday at the W Hotel in Hollywood.

As of last Friday, Brown, 21, was on life support after being found unresponsive, face-down in a bathtub. She is currently being treated at an Atlanta area hospital. Brown is the only child of Houston and singer Bobby Brown.

Several hundred people gathered Monday for a vigil in Brown’s honor at the Amphitheater at Riverdale Town Center in Riverdale, just outside of Atlanta.

"The facts are the facts right now, that she's sitting here, fighting for her life, surrounded by the people who love her the most," Costner said.

Costner has long been close with the Houston family. He produced and co-starred in the 1992 film, “The Bodyguard,” with Houston, and it was Costner who suggested they use the song, "I Will Always Love You," as the movie’s signature ballad.

Not only did the movie help launch Houston to mega-stardom, the song, “I Will Always Love You,” became her anthem, earning three Grammys and a spot on Billboard's "Greatest Songs of All Time” list.

In a case that is strikingly similar to her daughter’s, Whitney Houston was found face down in a hotel bathtub on Feb. 11, 2012, in Beverly Hills, Calif. Authorities ruled her death a drowning, complicated by cocaine use and heart disease.

"My thoughts are probably similar to everyone, which is, obviously, the similarities, what's going on, the worry that this might have happened again," Costner said, adding that he is hoping Brown gets “to have a second chance at this most precious life that we are all given.”

Watch the full interview with Kevin Costner in an upcoming "Nightline" story. "Nightline" airs weekdays at 12:35 a.m. ET.