The 77 year old hit headlines in November (12) when she was seen visiting the private Wellington Hospital in London.
Reports suggested she was hospitalised after suffering severe chest pains and taken to a specialist cardiac unit, but her representative played down reports of ill health, saying, ""She is fine and well at home.""
Downton Abbey producer Gareth Neame has now insisted Smith is not sick and blamed false rumours for upsetting fans.
He tells the New York Post, ""She went into the hospital for a routine check-up and was at a lunch party the next day, but for a few quid (money) someone in the hospital sent out word she's ailing. Not true... People make things up.""