December 26, 2016 9:59 AM EST

Carrie Fisher is in stable condition after a medical emergency this weekend, her mother said on Christmas Day.

“Carrie is in stable condition. If there is a change,we will share it. For all her fans & friends. I thank you for your prayers & good wishes,” Debbie Reynolds tweeted on Sunday.

Fisher, best known for playing Princess Leia in Star Wars, has been in the hospital since Friday when she had a medical emergency on a plane headed to Los Angeles from London. The 60-year-old actor was reportedly unresponsive when medical personnel arrived and has been “aggressively treated.”

Write to Tessa Berenson at tessa.berenson@time.com.

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