“He is the actor that was in UP”에서 UP 뜻이 궁금해요

“He is the actor that was in UP.”이라는 문장에서 UP은 무슨 뜻인가요?
“그는 배우다” 뒤에 붙은 “that was in UP”은 어떤 배우라는 의미인지 궁금해요.