Selma Blair is battling multiple sclerosis, and says although she was diagnosed in August, she has probably been suffering with the condition for ''15 years at least'."
The 46-year-old Cruel Intentions actress said she was "OK", but revealed it was "overwhelming in the beginning".
"I am disabled," she said in a post on Instagram. "I fall sometimes. I drop things. My memory is foggy. And my left side is asking for directions from a broken GPS.
"But we are doing it. And I laugh and I don't know exactly what I will do precisely but I will do my best."
The actress is due to star in Netflix's upcoming sci-fi drama series Another Life, and she opened up about how the show's costume designer had been helping to dress her.
"She carefully gets my legs in my pants, pulls my tops over my head, buttons my coats and offers her shoulder to steady myself," she said.
Despite the diagnosis, Blair said she was "relieved" to find out and wanted to help others in similar situations.
"I want my life to be full somehow," she added.
"I want to play with my son again. I want to walk down the street and ride my horse."
