leading part, leading actor (actress)
Example sentences
次の文化祭で初めて主役を演じることになっています。
He will play the leading role for the first time in the next school festival.
私の妹が主役を演じた。
My sister played the leading character.
ボブは今度の学園祭で初めて主役を演じる。
Bob will play the leading role for the first time in the next school festival.