Passage: Et tu, Brute? (pronounced ( ɛt ˈtuː ˈbruːtɛ) ) is a Latin phrase meaning "and you, Brutus?", made famous by its occurrence in William Shakespeare's play Julius Caesar, where it is uttered by the Roman dictator Julius Caesar to his friend Marcus Brutus at the moment of the former's assassination. The Latin expression first occurs in Elizabethan literary texts. The quotation is widely used in the English-speaking world to signify the unexpected betrayal by a person, such as a friend.

Question: Based on this passage, who said et tu brute then fall caesar?
Steam of consciousness below:

To answer the above question, the relevant sentence is: Et tu, Brute? (pronounced ( ɛt ˈtuː ˈbruːtɛ) ) is a Latin phrase meaning "and you, Brutus?", made famous by its occurrence in William Shakespeare's play Julius Caesar, where it is uttered by the Roman dictator Julius Caesar to his friend Marcus Brutus at the moment of the former's assassination.
So, the answer is the Roman dictator Julius Caesar.