Former talent scout Lele Mora and former television anchorman Emilio Fede, each received a seven-year sentence. Nicole Minetti, former legislator and Berlusconi's dental hygienist, received a five-year sentence.
All three were banned from public office for their term of sentence, the Italian news agency ANSA reported.
The three organized alleged and notorious sex parties at Belusconi's residence in Arcore, Italy, and recruited prostitutes, one of whom, known as Ruby, was underage at the time, ANSA said.
She has denied Berlusconi paid her for sex.
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