She told The Guardian: “It’s going to take us a long time to change our habits, but I think that this is so obviously a step in the right direction.”
The star then revealed she was reusing clothes she has owned since the 90s.
Stella also admitted she tends to only buy about five new items a year.
She added: “At my age I think it’s probably quite normal you’re not that interested in consuming, [and not] loving shopping as much as when you’re much younger. We all need to think a little bit harder.”
She was also one of 200 public figures who signed an open letter by the publication opposing Scottish independence ahead of the referendum.