Actor Kevin Costner recently revealed that he struggled with a debilitating health condition while filming his 2016 movie Hidden Figures. 

Costner revealed as much during an interview with People magazine.

For those unfamiliar with Hidden Figures, here is the billing:

An incredible and inspiring untold true story about three women at NASA who were instrumental in one of history's greatest operations - the launch of astronaut John Glenn into orbit.

In the film, Costner played the character Al Harrison - a NASA bigshot.

"I was on morphine"

During the interview, Costner revealed that he was fairly sick with kidney stones during most of the shooting of Hidden Figures. 

"I've never worked drunk on a set. I've never worked high on a set, but I was on morphine the last two weeks that I worked on [Hidden Figures]," he told the magazine.

People goes on to report on how Costner had to work for a period of nearly two weeks with an IV drip.

Per the outlet, "While filming, he developed kidney stones and says he 'worked 10 days under an IV drip. I don't even know how. About three days of it I was normal and then something happened to me.'"

The outlet adds, "Costner, known for an unflappable work ethic, 'never missed a day of work,' but says, 'I sat in my trailer with a morphine drip in my arm.'"

"I wanted to cry"

According to Costner, he had to keep his sleeves rolled down while filming in order to hide the bruising that was left by the IV.

Costner admitted, "I wanted to cry, but there was everybody watching, so I didn't."

For those less familiar with kidney stones, MayoClinic explains:

Kidney stones . . . are hard deposits made of minerals and salts that form inside your kidneys. Diet, excess body weight, some medical conditions, and certain supplements and medications are among the many causes of kidney stones. Kidney stones can affect any part of your urinary tract — from your kidneys to your bladder . . . Passing kidney stones can be quite painful, but the stones usually cause no permanent damage if they're recognized in a timely fashion . . . you may need nothing more than to take pain medication and drink lots of water . . . [or] surgery may be needed.

Costner told People that he had two kidney stones during the filming. One came after another.

It would appear that his decision to tough it out was worth it. The New York Post reports that Hidden Figures "made over $236 million at the worldwide box office and was nominated for three Oscars, including Best Picture."