Hi guys, since Lily James had mentioned 《冰雪奇缘》 a few times. I would write this 文章 if she were to voice wither one of the sisters, and after seeing her in 灰姑娘 and how the sisters remind me of the latter.

Elsa

After seeing the 2015 version of Cinderella, I personally think that Elsa reminds me of Ella. If Lily were to voice Elsa, I personally think that her character reminds me of Ella in a way, with a British accent!
If Lily sings Let it Go, it would sounds perfect after she nailed 'A Dream is a Wish Your 心 Makes'. I will be very happy about this decision.

Anna

Anna reminds me 90% person of Ella and if Lily were to cast as Anna, it would be amazing. Especially since they're optimistic and never give up on your dreams! Her meeting with Hans reminds me of when Ella meets Kit in the forest and the ball scene.

Conclusion

As these 2 princesses reminds me of Ella a lot. I also wish Lily James sang the overrated song as mentioned earlier, she has a lovely voice!