Duchess Catherine thinks having her own dresser is unnecessary and "extravagant".
The down-to-earth royal - who is married to Britain's Prince William - doesn't feel the need to have someone help her get dressed because she knows exactly what suits her.
A source said: "Catherine has an innate sense of style and, almost as importantly, knows what is appropriate for the occasion.
"She might not choose the most cutting edge designers, but she know what looks good on her and that's what counts.
"Plus she is acutely conscious that she is not yet a full-time working royal and feels it is pretty pointless, as well as extravagant, to have her own dresser."
Catherine - who was known as Kate Middleton before her wedding in April 2011 - was recently praised by Princess Diana's wedding dress designer for her thriftiness
The duchess is often spotted in styles from the British high street and Elizabeth Emanuel says it is wonderful that Catherine's clothing choices are accessible to the general public.
She said: "She wears clothes an ordinary girl can buy and that's the first time a royal has really done that, which is brilliant."