Gov. Bill Haslam of Tennessee granted clemency on Monday to Cyntoia Brown, commuting her life sentence for killing a man who had picked her up for sex when she was a teenage trafficking victim.

Ms. Brown, 30, will be released to supervised parole on Aug. 7, said Mr. Haslam, who will leave office later this month. She will have served 15 years in prison.

[Read the Times’s review of the Cyntoia Brown Netflix documentary, “Murder to Mercy.”]

“Cyntoia Brown committed, by her own admission, a horrific crime at the age of 16,” Mr. Haslam, a Republican, said. “Yet, imposing a life sentence on a juvenile that would require her to serve at least 51 years before even being eligible for parole consideration is too harsh, especially in light of the extraordinary steps Ms. Brown has taken to rebuild her life.”

“Transformation should be accompanied by hope,” he said.

Ms. Brown’s story attracted widespread attention and she garnered support from celebrities, including Rihanna and Kim Kardashian West. Lawmakers and rights activists highlighted the years of abuse and forced prostitution that she endured in her youth and lobbied the governor to grant her clemency before his term was up.