“You drove me back to my hotel in Burbank from a test years ago. For Kath and Kim. You were so kind to a young insecure clumsy actor. Thinking of ya right now. Thanks for being you,” Mosley wrote.
“Sending you love, light and healing. You are a brave warrior of light,” Hewitt added.
Blair had celebrated on Instagram last week after completing a new treatment for multiple sclerosis.
“Today is a banner day. I am being discharged from the care of an incredible team of nurses and techs and a visionary Dr. who believes in my healing as much as I do,” the star wrote.
“This has been a process. And will continue to be one. I am immunocompromised for next three months at least. So no kisses please,” she said. “For now, I have recovery.”
Blair was diagnosed with MS in August 2018. She discussed the effect her illness has had on Arthur, her 7-year-old son with ex-partner Jason Bleick, in the Aug. 5 issue of People.