The 14-year-old, who stars in new fantasy film The Secret Of Moonacre, said that she finds it amusing when people got the pair mixed up but wasn't certain if War Of The Worlds actress Fanning feels the same way.
"Yeah… people do sometimes [mix us up]," she told DS. "It's not annoying, it's just quite funny. I can imagine it can be quite annoying for her because I know that she's done a lot of films and she's really good and has a lot of experience."
She continued: "I just think it's really funny when people mistake us because they get embarrassed and they're like, 'I'm really sorry, I didn't mean that!' I don't really mind!"
Discussing her role in Moonacre, Richards said: "I play Maria Merryweather who's an orphan. She goes to live with her governess Miss Heliotrope in the country with her uncle. She finds out about all this magical stuff that's going on and she has to save the valley from destruction."
She confessed that Maria's inquisitive nature is a trait she shares with her character, adding: "It's not always a good one because a lot of the time I'll ask too many questions and people are like, 'Why do you even want to know?' I like it, I think if you didn't ask questions then the world would be boring and you would never learn anything."
> Click here to read our interview with Dakota Blue Richards