noun
successful role; hit role
Refers to a role in a play, film, or performance that suits the actor perfectly and becomes a major success or defining part of their career.
このドラマの主役は彼の当たり役になった。
The lead role in this drama became his signature successful role.
あの俳優は当たり役に恵まれて、一気
That actor was blessed with a hit role and quickly became popular.