After having her sentence commuted by President Trump, she was freed Wednesday after nearly 22 years in a federal prison.
Kim got a phone call earlier this week from Trump, who told her he reviewed the case and chose to commute Alice's sentence.
"There's a lot of family that want to see her".
Johnson, a first time non-violent offender, had gained prominence when Kardashian started lobbying on her behalf.
In 1996, Johnson was convicted of federal drug and money laundering charges.
"This time yesterday I was in prison looking through bars", Johnson said.
Before their meeting, Kardashian West told Mic that if she had the chance to meet the president, she'd tell him: "I really do believe that she's going to really thrive outside of prison, and I would just urge him to please pardon her".
As clemency petitions work their way through the system, the president routinely denies the "vast majority" of requests, a White House official said. "Not being there to see my grandchildren grow, to just be grand momma to them, that has been very hard for me".
Ms Johnson's commutation of sentence is the sixth act of clemency granted by Mr Trump since he took office and the second one issued after a celebrity had appealed to him.
In another tweet, she said she was grateful to President Trump and the others involved in Johnson's commutation.
On her first full day of freedom, she gave thanks for her second chance, and the man who granted it.