Rumer Willis is keeping fans updated on her father Bruce Willis' battle with frontotemporal dementia. Rumer, 37, opened up about the actor's health during an Instagram Q&A on Thursday, November 20, after a fan asked her, "How's your dad doing?" "People always ask me this question and I think it's kind of a hard one to answer because the truth is that anybody with FTD is not doing great," Rumer replied.