The blonde beauty took to Twitter on Thursday (24Sep15) and confessed she was battling a personal crisis, but failed to offer up any details about her troubles.

She wrote, "In need of a (prayer) circle right now."

When her fellow Twitter users responded with an outpouring of support, she simply replied, "Thank you. Feeling your (prayers)."

It wasn't until MCCarthy returned to the social networking site on Friday (25Sep15) that she shared a little more about the nature of her heartache, writing, "Update: my niece is stable in hospital. Searching for answers. Thank you your prayers. We felt them immensely."

MCCarthy's representative has since revealed to the New York Post the star's niece suffered a seizure and doctors are still trying to pinpoint a diagnosis.