"When I went (for an MRI) this week they didn't find any cancer at all," Carter told the crowd, according to NBC News. "So I have good news. So a lot of people prayed for me, and I appreciate that."
He later put out an official statement through The Carter Center which read, "My most recent MRI brain scan did not reveal any signs of the original cancer spots nor any new ones. I will continue to receive regular 3-week immunotherapy treatments of pembrolizumab."
In August, the Nobel Peace Prize laureate revealed that he had been diagnosed with brain cancer. The melanoma was discovered after surgery on his liver revealed he had cancer in other parts of his body. He received treatment -- which included radiation and a new drug, Keytruda, or pembrolizumab -- at Emory Healthcare in Georgia.
During his press conference over the summer, Carter shared that he was "surprisingly at ease" with the news.
"I just thought I had a few weeks left. But I was surprisingly at ease. I've had a wonderful life, I've had thousands of friends, and I've had an exciting and adventurous and gratifying existence," he said. "So I was surprisingly at ease. Much more so than my wife [Rosalynn Carter] was. But now I feel that, you know, it's in the hands of God and my worship, and I'll be prepared for anything that comes."