What happens to a jury trial when the defendant is a very famous person?

Couldnt it alter the jurys preconception about the defendant which could affect their decision to say guilty/ not guilty. or:Couldn't it alter the jur

Couldn't it alter the jury's preconception about the defendant which could affect their decision to say guilty/ not guilty.

or:Couldn't it alter the jury's preconception about the defendant which could affect their decision to say guilty/ not guilty.

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