Carrie Fisher remains hospitalized after suffering a heart attack, but she is in stable condition, her mother tweeted Sunday. "If there is a change, we will share it," wrote actress Debbie Reynolds. "For all her fans & friends. I thank you for your prayers & good wishes." The 60-year-old Fisher was in the ICU of the UCLA Medical Center after going into cardiac arrest Friday on a flight from London to Los Angeles. The "cardiac incident" happened shortly before the plane was to land, reports CNN. Star Wars co-star Mark Hamill was among those offering support online Sunday, tweeting images of himself and Fisher from years ago. (More Carrie Fisher stories.)