**Structure:**

```
Actor <=== ActorMovie ===> Movie

ActorMovie: ActorID (fk), MovieId (fk)... ===> pk: (ActorID, MovieID)

```

Should do I create a surrogate key for `ActorMovie` table like this?

```
ActorMovie: ActorMovieID (pk), ActorID (fk), MovieId (fk)...

```