diff --git a/learn_sql_model/models/hero.py b/learn_sql_model/models/hero.py
index 5b197cf..734fdeb 100644
--- a/learn_sql_model/models/hero.py
+++ b/learn_sql_model/models/hero.py
@@ -1,8 +1,9 @@
 from typing import Optional
 
-from sqlmodel import Field
+from sqlmodel import Field, Relationship
 
 from learn_sql_model.models.fast_model import FastModel
+from learn_sql_model.models.pet import Pet
 
 
 class Hero(FastModel, table=True):
@@ -11,3 +12,6 @@ class Hero(FastModel, table=True):
     secret_name: str
     age: Optional[int] = None
     shoe_size: Optional[int] = None
+
+    pet_id: Optional[int] = Field(default=None, foreign_key="pet.id")
+    pet: Optional[Pet] = Relationship(back_populates="hero")