Christina Applegate, 50, is finding her multiple sclerosis diagnosis “challenging,” according to former co-star David Faustino. The actor, who worked with the actress on the television series Married…With Children, attended the Race to Erase MS Gala at the Fairmont Century Plaza in Los Angeles, CA and gave an update on how she’s handling the tough condition. “Christina is in her first year, it’s hard, it’s challenging, and she’s pushing through” he EXCLUSIVELY told HollywoodLife at the event.