Simplify the following text for a Grade 9 native English-speaking person.
Original: Stallone had his first role in the softcore pornography film Party at Kitty and Stud 's ( 1970 ) , which was later re-released as Italian Stallion .
Simplified: Stallone had his first starring role in the soft core pornography feature film The Party at Kitty and Stud 's ( 1970 ) .