well i was looking at a picture of those two and i was thinking about how they are alike and i found out that they both:
- have brown hair
- have big dark brown eyes
- are pale
- have strong jaw line
- are slim
- have the same heart-shaped face with pointed chin
- share the same zodiac "Gemini"
- have really a good sence of humor
- often play eccentric characters
- share a passion for completely immersing themselves into the roles they're playing so much so that their true personalities are completely concealed
- can play any role perfectly
- right handed

simpley Helena Bonham Carter is the female version of Johnny Depp