Simplify the following text for a Grade 5 native English-speaking person.
Original: He began acting in the late 1970s , gained fame as a teen idol during the 1980s , and made a successful career as an adult actor in the decades following , ending in an Oscar nomination for his acting in the film Crash .
Simplified: He began acting in the late 1970s , gaining fame as a teenage idol during the 1980s .