diff --git a/src/App.tsx b/src/App.tsx
index e628e9c..3ef9071 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -6,8 +6,9 @@ import { Section } from './components/Section';
 import { MovieList } from './components/MovieList'; 
 import { PersonList } from './components/PersonList';
 import { useDebouncedValue } from './hooks/useDebouncedValue';
-import './App.css';
+import { useFavorites } from './hooks/useFavorites';
 import { TrendingPreview } from './components/TrendingPreview';
+import './App.css';
 
 function App() {
 
@@ -19,6 +20,7 @@ function App() {
   const debouncedQuery = useDebouncedValue(query, 400);
   const search = useSearchMovies(debouncedQuery)
   const isSearching = query.trim().length > 0;
+  const { isFavorite, toggleFavorite} = useFavorites();
 
   return (
     <div className="page">
@@ -27,19 +29,19 @@ function App() {
       <main>
         {isSearching ? (
           <Section id="sok" title={`Søkeresultater for "${query}"`} isLoading={search.isLoading} error={search.error}>
-            {search.data && <MovieList movies={search.data} />}
+                        {search.data && <MovieList movies={search.data} isFavorite={isFavorite} onToggleFavorite={toggleFavorite} />}
           </Section>
-        ) : (
+          ) : (
           <>
             <Section id="trendingPreview" title="" isLoading={current.isLoading} error={current.error}>
               {current.data && <TrendingPreview movies={current.data}/>}
             </Section>
             <Section id="populaere" title="Populære filmer" isLoading={popular.isLoading} error={popular.error}>
-              {popular.data && <MovieList movies={popular.data} />}
+                            {popular.data && <MovieList movies={popular.data} isFavorite={isFavorite} onToggleFavorite={toggleFavorite} />}
             </Section>
 
             <Section id="nye-filmer" title="Nye filmer" isLoading={current.isLoading} error={current.error}>
-              {current.data && <MovieList movies={current.data} />}
+                            {current.data && <MovieList movies={current.data} isFavorite={isFavorite} onToggleFavorite={toggleFavorite} />}
             </Section>
 
             <Section id="skuespillere" title="Skuespillere" isLoading={people.isLoading} error={people.error}>
diff --git a/src/api/tmdb.ts b/src/api/tmdb.ts
index 162cb09..a837d11 100644
--- a/src/api/tmdb.ts
+++ b/src/api/tmdb.ts
@@ -42,4 +42,8 @@ export function fetchMovieCredits(movieId: number): Promise<CreditsResponse> {
     `/movie/${movieId}/credits?language=en-US`,
     'Klarte ikke hente skuespillere...',
   );
+
+  
 }
+
+
diff --git a/src/components/MovieCard.css b/src/components/MovieCard.css
index 607d594..0e7996b 100644
--- a/src/components/MovieCard.css
+++ b/src/components/MovieCard.css
@@ -83,6 +83,21 @@
   z-index: 1;
 }
 
+/*Favorite merke som stjerne nede til venste*/
+.movie-card__favorite {
+  position: absolute;
+  bottom: 0.5rem;
+  right: 0.5rem;
+  z-index: 1;
+  background: none;
+  border: none;
+  padding: 0;
+  font-size: 1.5rem;
+  line-height: 1;
+  color: #fbc02d;
+  cursor: pointer;
+}
+
 @media (max-width: 480px) {
   .movie-card__poster {
     width: 80px;
@@ -95,4 +110,4 @@
   .movie-card__info {
     padding-right: 3rem;
   }
-}
\ No newline at end of file
+}
diff --git a/src/components/MovieCard.tsx b/src/components/MovieCard.tsx
index fb9fd10..527203a 100644
--- a/src/components/MovieCard.tsx
+++ b/src/components/MovieCard.tsx
@@ -8,9 +8,11 @@ interface MovieCardProps {
   title: string; // Filmens tittel, skal vises som overskrift
   posterUrl: string; // URL til filmplakat-bildet, brukes i <img>
   rating: number; // Terningkast/prosent (0-100), f.eks. vote_average * 10 fra TMDB
+  isFavorite: boolean; // Om denne filmen er markert som favoritt
+  onToggleFavorite: (id: number) => void; // Kalles når stjernen klikkes
 }
 
-function MovieCard({ movieId, title, posterUrl, rating }: MovieCardProps) {
+function MovieCard({ movieId, title, posterUrl, rating, isFavorite, onToggleFavorite }: MovieCardProps) {
   // Henter skuespillere for akkurat denne filmen når kortet vises
   const { data: credits, isLoading } = useMovieCredits(movieId);
 
@@ -19,6 +21,16 @@ function MovieCard({ movieId, title, posterUrl, rating }: MovieCardProps) {
 
   return (
     <div className="movie-card">
+      <button
+        type="button"
+        className="movie-card__favorite"
+        aria-pressed={isFavorite}
+        aria-label={isFavorite ? `Fjern ${title} fra favoritter` : `Legg ${title} til favoritter`}
+        onClick={() => onToggleFavorite(movieId)}
+      >
+        {isFavorite ? "★" : "☆"}
+      </button>
+
       <span className="movie-card__rating">{rating}%</span>
 
       <img className="movie-card__poster" src={posterUrl} alt={title} />
diff --git a/src/components/MovieList.tsx b/src/components/MovieList.tsx
index d7b2d4c..fa9e86a 100644
--- a/src/components/MovieList.tsx
+++ b/src/components/MovieList.tsx
@@ -9,9 +9,11 @@ import "./MovieList.css";
 // MovieCard selv vet ingenting om TMDB eller fetching, den bare mottar props.
 type MovieListProps = {
   movies: Movie[];
+  isFavorite: (id: number) => boolean;
+  onToggleFavorite: (id: number) => void;
 };
 
-export function MovieList({ movies }: MovieListProps) {
+export function MovieList({ movies, isFavorite, onToggleFavorite }: MovieListProps) {
   return (
     // Ytre container for hele filmlisten, kan style'es med CSS senere
     <div className="movie-list">
@@ -35,6 +37,8 @@ export function MovieList({ movies }: MovieListProps) {
           // Skuespillere ligger ikke i dette API-svaret (krever eget kall til /credits),
           // så vi sender en tom liste som placeholder inntil videre
           movieId={movie.id}
+          isFavorite={isFavorite(movie.id)}
+          onToggleFavorite={onToggleFavorite}
         />
       ))}
     </div>
diff --git a/src/components/sidebar.tsx b/src/components/sidebar.tsx
index b9e7248..a2a3cf3 100644
--- a/src/components/sidebar.tsx
+++ b/src/components/sidebar.tsx
@@ -47,7 +47,7 @@ export function Sidebar({onSearch, searchValue}: SidebarProps) {
     {section.label}
   </a>
 </li>
-                    ))}
+                ))}
                 </ul>
             </nav>
         </aside>
diff --git a/src/hooks/useFavorites.ts b/src/hooks/useFavorites.ts
new file mode 100644
index 0000000..06100a7
--- /dev/null
+++ b/src/hooks/useFavorites.ts
@@ -0,0 +1,25 @@
+import { useState, useEffect } from 'react';
+
+const STORAGE_KEY = 'favorite-movies';
+
+export function useFavorites() {
+  const [favoriteIds, setFavoriteIds] = useState<number[]>(() => {
+    const stored = localStorage.getItem(STORAGE_KEY);
+    return stored ? JSON.parse(stored) : [];
+  });
+
+  useEffect(() => {
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(favoriteIds));
+  }, [favoriteIds]);
+
+  function toggleFavorite(id: number) {
+    setFavoriteIds((prev) =>
+      prev.includes(id) ? prev.filter((favId) => favId !== id) : [...prev, id]
+    );
+  }
+
+  function isFavorite(id: number) {
+    return favoriteIds.includes(id);
+  }
+
+return { toggleFavorite, isFavorite};}
\ No newline at end of file