Washington: President Donald Trump has commuted the sentence of a woman serving a life sentence for drug offences whose cause was championed by reality TV star Kim Kardashian West in a recent visit to the White House.

Trump commuted the sentence of Alice Marie Johnson, 63, who had served more than 20 years behind bars and was not eligible for parole. The move comes amid a recent flurry of pardons issued by Trump, who has seemed drawn to causes advocated by conservatives, celebrities or those who once appeared on his former reality show, The Apprentice.

"I'm a bit discombobulated right now," said Johnson's daughter, Tretessa Johnson, who expected her mother to be released from prison immediately.

She said she found out the news via TV and she thanked Trump and Kardashian, who contacted Johnson's lawyer after watching a video made about the great-grandmother's plight.