Usage Note
Diventare takes essere as its auxiliary in compound tenses, so the past participle agrees with the subject: lei è diventata famosa. It expresses a change of state and is interchangeable with divenire in formal registers, but diventare is the everyday choice.
Examples
"È diventato un bravo medico."
Natural Translation
He became a good doctor.
Literal Translation
Is become a good doctor.

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