diff --git a/moto/cloudfront/models.py b/moto/cloudfront/models.py
index 2ccf700fa..d182d2939 100644
--- a/moto/cloudfront/models.py
+++ b/moto/cloudfront/models.py
@@ -100,6 +100,8 @@ class Origin:
 class DistributionConfig:
     def __init__(self, config):
         self.config = config
+        self.aliases = config.get("Aliases", {}).get("Items", {}).get("CNAME", [])
+        self.comment = config.get("Comment", "")
         self.default_cache_behavior = DefaultCacheBehaviour(
             config["DefaultCacheBehavior"]
         )
@@ -145,7 +147,6 @@ class Distribution(BaseModel):
         self.distribution_config = DistributionConfig(config)
         self.active_trusted_signers = ActiveTrustedSigners()
         self.active_trusted_key_groups = ActiveTrustedKeyGroups()
-        self.aliases = []
         self.origin_groups = []
         self.alias_icp_recordals = []
         self.last_modified_time = "2021-11-27T10:34:26.802Z"
diff --git a/moto/cloudfront/responses.py b/moto/cloudfront/responses.py
index 153b558bc..8af7efca1 100644
--- a/moto/cloudfront/responses.py
+++ b/moto/cloudfront/responses.py
@@ -381,7 +381,7 @@ DIST_CONFIG_TEMPLATE = """
         </Items>
         {% endif %}
       </CustomErrorResponses>
-      <Comment>{{ CommentType }}</Comment>
+      <Comment>{{ distribution.distribution_config.comment }}</Comment>
       <Logging>
         <Enabled>{{ distribution.distribution_config.logging.enabled }}</Enabled>
         <IncludeCookies>{{ distribution.distribution_config.logging.include_cookies }}</IncludeCookies>
diff --git a/tests/test_cloudfront/test_cloudfront_distributions.py b/tests/test_cloudfront/test_cloudfront_distributions.py
index ca33da714..104adef9c 100644
--- a/tests/test_cloudfront/test_cloudfront_distributions.py
+++ b/tests/test_cloudfront/test_cloudfront_distributions.py
@@ -121,7 +121,9 @@ def test_create_distribution_s3_minimum():
 
     config.should.have.key("CacheBehaviors").equals({"Quantity": 0})
     config.should.have.key("CustomErrorResponses").equals({"Quantity": 0})
-    config.should.have.key("Comment").equals("")
+    config.should.have.key("Comment").equals(
+        "an optional comment that's not actually optional"
+    )
 
     config.should.have.key("Logging")
     logging = config["Logging"]
@@ -149,6 +151,21 @@ def test_create_distribution_s3_minimum():
     restriction.should.have.key("Quantity").equals(0)
 
 
+@mock_cloudfront
+def test_create_distribution_with_additional_fields():
+    client = boto3.client("cloudfront", region_name="us-west-1")
+
+    config = example_distribution_config("ref")
+    config["Aliases"] = {"Quantity": 2, "Items": ["alias1", "alias2"]}
+    resp = client.create_distribution(DistributionConfig=config)
+    distribution = resp["Distribution"]
+    distribution.should.have.key("DistributionConfig")
+    config = distribution["DistributionConfig"]
+    config.should.have.key("Aliases").equals(
+        {"Items": ["alias1", "alias2"], "Quantity": 2}
+    )
+
+
 @mock_cloudfront
 def test_create_distribution_returns_etag():
     client = boto3.client("cloudfront", region_name="us-east-1")