O que faz com que a propriedade não exista no erro de tipo neste aplicativo Angular 16 filmes?

Tenho trabalhado em um SPA com Angular 16, TypeScript e The Movie Database (TMDB).

Tenho um problema ao trabalhar na exibição dos detalhes de um filme.

Em app\services\movie-service.service.tseu tenho:

import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';
import { environment } from '../../environments/environment';
import { HttpClient } from '@angular/common/http';
import { MovieResponse } from '../models/Movie';
import { Genre, GenreResponse } from '../models/Genre';

@Injectable({
  providedIn: 'root'
})

export class MovieService {

  constructor(private http: HttpClient) { }


  public getLatestMovies(): Observable<MovieResponse> {
    return this.http.get<MovieResponse>(`${environment.apiUrl}/movie/now_playing?api_key=${environment.apiKey}`);
  }

  public getMovieDetails(id: Number): Observable<MovieResponse>{
    return this.http.get<MovieResponse>(`${environment.apiUrl}/movie/${id}?api_key=${environment.apiKey}`);
  }
}

Em app\models\Movie.tseu tenho:

export interface Movie {
    id?: number;
    adult?: boolean;
    backdrop_path?: string;
    poster_path?: string;
    title?: string;
    original_title?: string;
    tagline?: string;
    overview?: string;
    genre_ids?: any;
    release_date?: string;
    runtime?: number;
    vote_average?: string;
}

export interface MovieResponse {
    results?: Movie[];
    total_pages?: number;
    total_results?: number;
    page?: number;
}

Em app\components\movie-details\movie-details.component.tseu tenho:

import { Component } from '@angular/core';
import { MovieResponse, Movie } from '../../models/Movie';
import { MovieService } from '../../services/movie-service.service';
import { ActivatedRoute } from '@angular/router';

@Component({
  selector: 'app-movie-details',
  templateUrl: './movie-details.component.html',
  styleUrls: ['./movie-details.component.scss']
})
export class MovieDetailsComponent {

  constructor(private movieService: MovieService, private activatedRoute: ActivatedRoute) { }

  public movieResponse!: MovieResponse;
  public movie_id: Number = 0;

  public showMovieDetails() {
    this.movie_id = Number(this.activatedRoute.snapshot.paramMap.get('id'));

    this.movieService.getMovieDetails(this.movie_id).subscribe((response) => {
      this.movieResponse = response;
    });
  }

  ngOnInit() {
    this.showMovieDetails();
  }
}

Em app\components\movie-details\movie-details.component.htmltento exibir o título do filme:

<div *ngIf="movieResponse">
  <h1>{{ movieResponse?.original_title }}</h1>
</div>

O problema

Insted do resultado desejado, recebo este erro no navegador:

TS2339: Property 'original_title' does not exist on type 'MovieResponse'.

Questões

1. O que estou fazendo de errado?
2. Qual é a maneira mais confiável de corrigir esse problema?