Dianna Agron explains why Kristin Bell is one of the nicest people in showbiz

Dianna Agron is known for playing feisty Quinn Fabray on Glee.

But before she hit the big time, the actress had several cameo roles in other US sitcoms.

But who was her favourite co-star?

Source: http://showbiz.sky.com/dianna-why-i-love-kristen

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