Proud day at the Palace for TV's Angela Rippon
Former BBC newsreader Angela Rippon said collecting a CBE for championing the rights of people with dementia was "very special" because of the personal impact the illness has had on her life.
Miss Rippon (72) has used her own experiences of caring for her mother Edna, who was diagnosed with the condition in 2004, to try to help others with the condition. Her mother died in 2009.
As the Duke of Cambridge presented her with the award, he spoke to her of the "commitment that he and his family have to work on mental health".
She said later: "We have a joint interest there because mental health is one of those things which is like a hidden illness, a lot of people do not understand it, and the same goes with dementia."
Miss Rippon said she was honoured that the award was for her campaigns on behalf of sufferers, their families and carers.
She is helping to lead a programme to improve understanding, awareness and facilities.