Complex sentence: Several talented and famous actors were engaged in this film, including some of the most brilliant Greek stars who portrayed the major roles, while composer Mimis Plessas and singer Giannis Poulopoulos surrounded the characters of the film producing a great musical result.
Split into simpler sentences: Several talented and famous actors were engaged in this film, including some of the most brilliant Greek stars who portrayed the major roles. In addition to this, composer Mimis Plessas and singer Giannis Poulopoulos surrounded the characters of the film producing a great musical result.