The iconic "Star Wars" actress went into cardiac arrest while onboard a LA-bound flight on Friday.
Reynolds took to Twitter to inform fans about the 60-year-old star's health and also thanked them for their concern.
"Carrie is in stable condition. If there is a change, we will share it. For all her fans and friends. I thank you for your prayers and good wishes," she wrote.
Fisher was rushed to UCLA Medical Center by Los Angeles Fire Department paramedics after the 11-hour flight touched down at Los Angeles International Airport shortly after noon on Friday.
On December 24, Fisher's brother, Todd, confirmed that she was receiving treatment in an intensive-care unit, saying only, "We have to wait and be patient.