What is the Italian translation of 'I am so proud of you'?

Sono così fiero di te in the masculine and Sono così fiera di te in the feminine are Italian equivalents of the English phrase "I am so proud of you."

Specifically, the verb sono means "(I) am" in this context. The masculine adjective fiero and the feminine fiera mean "proud." The preposition di means "of, from." The personal pronoun te means "(informal singular) you."

The pronunciation is "SOH-noh koh-ZEE FYEH-roh dee teh" in the masculine and "SOH-noh KOH-zee FYEH-rah dee teh" in the feminine.