How do I changes in the code after inserting an object

In Movie.hpp

    #ifndef MOVIE_H
    #define  MOVIE_H
    
    class Movie
    {
      private:
        std::string title;
      public:
        std::string getTitle() const {return this->title;}   
        void setTitle(std::string newTitle){this->title = newTitle;}
    };
    
    #endif
In Actor.hpp

    #ifndef ACTOR_H
    #define  ACTOR_H
    
    #include "Person.hpp"
    #include "Movie.hpp"
    
    class Actor: public Person
    {
      private:
        std::vector<Movie> movieList;
      public:
        void addMovie(Movie newMovie){this->movieList.push_back(newMovie);}
        void printMovies()
        {
          for(Movie movie: this->movieList)
          {
            std::cout << movie.getTitle() << '\n';
          }
        }
    };
    
    #endif

What are the changes will be there in the code if I add a separate class

    class Role {
    private:
       Actor* actor;
       Movie* movie;
    };

and store collection of such objects inside Movie and Actor

    std::vector<Role> movieList; //inside Actor

    std::vector<Role> actorList; //inside Movie

Someone please help me out by editing the code in Movie.hpp and Actor.hpp using the "Role" Object defined above.