Actress Christina Applegate diagnosed with multiple sclerosis

The 49-year-old actress said in a tweet that she was diagnosed 'a few months ago'. Photo: AP

Emmy-winning US actress Christina Applegate has been diagnosed with multiple sclerosis (MS), and described her condition as a "tough road".

"A few months ago I was diagnosed with MS. It's been a strange journey. But I have been so supported by people that I know who also have this condition. It's been a tough road. But as we all know, the road keeps going," she said in a tweet on Tuesday (Aug 10).