diff --git a/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameController.java b/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameController.java
index cb8f6fd..0b385f1 100644
--- a/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameController.java
+++ b/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameController.java
@@ -23,11 +23,13 @@ import java.util.Optional;
 public class BlackJackGameController {
 
     private final UserService userService;
+    private final BlackJackService blackJackService;
     private final BlackJackGameRepository blackJackGameRepository;
     private final UserRepository userRepository;
 
-    public BlackJackGameController(UserService userService, BlackJackGameRepository blackJackGameRepository, UserRepository userRepository) {
+    public BlackJackGameController(UserService userService, BlackJackService blackJackService, BlackJackGameRepository blackJackGameRepository, UserRepository userRepository) {
         this.userService = userService;
+        this.blackJackService = blackJackService;
         this.blackJackGameRepository = blackJackGameRepository;
         this.userRepository = userRepository;
     }
@@ -60,6 +62,14 @@ public class BlackJackGameController {
         game.setUser(user);
         game.setBet(betAmount);
 
+        for (int i = 0; i < 2; i++) {
+            CardEntity playerCard = blackJackService.createRandomCard(game);
+            game.getPlayerCards().add(playerCard);
+        }
+
+        CardEntity dealerCard = blackJackService.createRandomCard(game);
+        game.getDealerCards().add(dealerCard);
+
         user.setBalance(user.getBalance().subtract(betAmount));
 
         userRepository.save(user);
diff --git a/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameEntity.java b/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameEntity.java
index 9625c92..e3380a7 100644
--- a/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameEntity.java
+++ b/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameEntity.java
@@ -1,5 +1,7 @@
 package de.szut.casino.blackjack;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonManagedReference;
 import de.szut.casino.user.UserEntity;
 import jakarta.persistence.*;
 import lombok.AllArgsConstructor;
@@ -9,6 +11,7 @@ import lombok.Setter;
 
 import java.math.BigDecimal;
 import java.util.ArrayList;
+import java.util.List;
 
 @Entity
 @Getter
@@ -19,9 +22,25 @@ public class BlackJackGameEntity {
     @Id
     @GeneratedValue
     private Long id;
+
     @ManyToOne
     @JoinColumn(name = "user_id", nullable = false)
+    @JsonIgnore
     private UserEntity user;
+
+    // Expose UserID to JSON output
+    public Long getUserId() {
+        return user != null ? user.getId() : null;
+    }
+
     private String state;
     private BigDecimal bet;
+
+    @OneToMany(mappedBy = "game", cascade = CascadeType.ALL, orphanRemoval = true)
+    @JsonManagedReference
+    private List<CardEntity> playerCards = new ArrayList<>();
+
+    @OneToMany(mappedBy = "game", cascade = CascadeType.ALL, orphanRemoval = true)
+    @JsonManagedReference
+    private List<CardEntity> dealerCards = new ArrayList<>();
 }
diff --git a/backend/src/main/java/de/szut/casino/blackjack/BlackJackService.java b/backend/src/main/java/de/szut/casino/blackjack/BlackJackService.java
new file mode 100644
index 0000000..8defe57
--- /dev/null
+++ b/backend/src/main/java/de/szut/casino/blackjack/BlackJackService.java
@@ -0,0 +1,17 @@
+package de.szut.casino.blackjack;
+
+import org.springframework.stereotype.Service;
+import java.util.Random;
+
+@Service
+public class BlackJackService {
+    private final Random random = new Random();
+
+    public CardEntity createRandomCard(BlackJackGameEntity game) {
+        CardEntity card = new CardEntity();
+        card.setGame(game);
+        card.setSuit(Suit.values()[random.nextInt(Suit.values().length)]);
+        card.setRank(Rank.values()[random.nextInt(Rank.values().length)]);
+        return card;
+    }
+}
diff --git a/backend/src/main/java/de/szut/casino/blackjack/CardEntity.java b/backend/src/main/java/de/szut/casino/blackjack/CardEntity.java
index f03a5a1..8026d72 100644
--- a/backend/src/main/java/de/szut/casino/blackjack/CardEntity.java
+++ b/backend/src/main/java/de/szut/casino/blackjack/CardEntity.java
@@ -1,15 +1,33 @@
 package de.szut.casino.blackjack;
 
 
+import com.fasterxml.jackson.annotation.JsonBackReference;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
 import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
 
+@Entity
 @Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
 public class CardEntity {
-    private final Suit suit;
-    private final Rank rank;
+    @Id
+    @GeneratedValue
+    @JsonIgnore
+    private Long id;
 
-    public CardEntity(Suit suit, Rank rank) {
-        this.suit = suit;
-        this.rank = rank;
-    }
+    @ManyToOne
+    @JoinColumn(name = "game_id", nullable = false)
+    @JsonBackReference
+    private BlackJackGameEntity game;
+
+    @Enumerated(EnumType.STRING)
+    private Suit suit;
+
+    @Enumerated(EnumType.STRING)
+    private Rank rank;
 }