diff --git a/.changes/unreleased/Breaking Changes-20230727-170535.yaml b/.changes/unreleased/Breaking Changes-20230727-170535.yaml
new file mode 100644
index 00000000..f432d06f
--- /dev/null
+++ b/.changes/unreleased/Breaking Changes-20230727-170535.yaml	
@@ -0,0 +1,6 @@
+kind: Breaking Changes
+body: Use CamelCase in the `WhereFilter` Template Calls
+time: 2023-07-27T17:05:35.447535-07:00
+custom:
+  Author: plypaul
+  Issue: "129"
diff --git a/dbt_semantic_interfaces/parsing/where_filter_parser.py b/dbt_semantic_interfaces/parsing/where_filter_parser.py
index 71bc893a..40a367ec 100644
--- a/dbt_semantic_interfaces/parsing/where_filter_parser.py
+++ b/dbt_semantic_interfaces/parsing/where_filter_parser.py
@@ -121,9 +121,9 @@ def _entity_call(entity_name: str, entity_path: Sequence[str] = ()) -> str:
 
         try:
             SandboxedEnvironment(undefined=StrictUndefined).from_string(where_sql_template).render(
-                dimension=_dimension_call,
-                time_dimension=_time_dimension_call,
-                entity=_entity_call,
+                Dimension=_dimension_call,
+                TimeDimension=_time_dimension_call,
+                Entity=_entity_call,
             )
         except (UndefinedError, TemplateSyntaxError, SecurityError) as e:
             raise ParseWhereFilterException(f"Error while parsing Jinja template:\n{where_sql_template}") from e
diff --git a/tests/fixtures/semantic_manifest_yamls/simple_semantic_manifest/metrics.yaml b/tests/fixtures/semantic_manifest_yamls/simple_semantic_manifest/metrics.yaml
index 57555077..a185117f 100644
--- a/tests/fixtures/semantic_manifest_yamls/simple_semantic_manifest/metrics.yaml
+++ b/tests/fixtures/semantic_manifest_yamls/simple_semantic_manifest/metrics.yaml
@@ -54,7 +54,7 @@ metric:
   type_params:
     measure:
       name: booking_value
-  filter: "{{ dimension('booking__is_instant') }}"
+  filter: "{{ Dimension('booking__is_instant') }}"
 ---
 metric:
   name: "average_instant_booking_value"
@@ -63,7 +63,7 @@ metric:
   type_params:
     measure:
       name: average_booking_value
-  filter:  "{{ dimension('booking__is_instant') }}"
+  filter:  "{{ Dimension('booking__is_instant') }}"
 ---
 metric:
   name: "booking_value_for_non_null_listing_id"
@@ -72,7 +72,7 @@ metric:
   type_params:
     measure:
       name: booking_value
-  filter: "{{ entity('listing') }} IS NOT NULL"
+  filter: "{{ Entity('listing') }} IS NOT NULL"
 ---
 metric:
   name: "bookers"
@@ -113,7 +113,7 @@ metric:
   type_params:
     measure:
       name: listings
-  filter: "{{ dimension('listing__is_lux_latest') }}"
+  filter: "{{ Dimension('listing__is_lux_latest') }}"
 ---
 metric:
   name: "smallest_listing"
@@ -276,7 +276,7 @@ metric:
   type_params:
     numerator:
       name: average_booking_value
-      filter: "{{ dimension('booking__is_instant') }}"
+      filter: "{{ Dimension('booking__is_instant') }}"
     denominator:
       name: max_booking_value
 ---
@@ -289,7 +289,7 @@ metric:
   type_params:
     numerator:
       name: average_booking_value
-      filter: "{{ dimension('listing__is_lux_latest', entity_path=['listing']) }}"
+      filter: "{{ Dimension('listing__is_lux_latest', entity_path=['listing']) }}"
     denominator:
       name: max_booking_value
 ---
@@ -303,9 +303,9 @@ metric:
     expr: "average_booking_value * bookings / NULLIF(booking_value, 0)"
     metrics:
       - name: average_booking_value
-        filter: "{{ dimension('listing__is_lux_latest', entity_path=['listing']) }}"
+        filter: "{{ Dimension('listing__is_lux_latest', entity_path=['listing']) }}"
       - name: bookings
-        filter: "{{ dimension('listing__is_lux_latest', entity_path=['listing']) }}"
+        filter: "{{ Dimension('listing__is_lux_latest', entity_path=['listing']) }}"
       - name: booking_value
 ---
 metric:
@@ -317,7 +317,7 @@ metric:
   type_params:
     numerator:
       name: booking_value
-      filter: "{{ dimension('booking__is_instant') }}"
+      filter: "{{ Dimension('booking__is_instant') }}"
       alias: booking_value_with_is_instant_constraint
     denominator:
       name: booking_value
@@ -331,11 +331,11 @@ metric:
   type_params:
     numerator:
       name: total_account_balance_first_day
-      filter: "{{ dimension('user__home_state_latest') }} IN ('CA', 'HI', 'WA')"
+      filter: "{{ Dimension('user__home_state_latest') }} IN ('CA', 'HI', 'WA')"
       alias: west_coast_balance_first_day
     denominator:
       name: total_account_balance_first_day
-      filter: "{{ dimension('user__home_state_latest') }} IN ('MD', 'NY', 'TX')"
+      filter: "{{ Dimension('user__home_state_latest') }} IN ('MD', 'NY', 'TX')"
       alias: east_coast_balance_first_dat
 ---
 metric:
@@ -347,7 +347,7 @@ metric:
     expr: delayed_bookings * 2
     metrics:
       - name: bookings
-        filter: "NOT {{ dimension('booking__is_instant') }}"
+        filter: "NOT {{ Dimension('booking__is_instant') }}"
         alias: delayed_bookings
 ---
 metric:
@@ -398,7 +398,7 @@ metric:
       - name: bookings
       - name: listings
         alias: lux_listing
-        filter: "{{ dimension('listing__is_lux_latest') }}"
+        filter: "{{ Dimension('listing__is_lux_latest') }}"
 ---
 metric:
   name: "instant_plus_non_referred_bookings_pct"
diff --git a/tests/implementations/where_filter/test_parse_calls.py b/tests/implementations/where_filter/test_parse_calls.py
index 7c113b53..0fb7d04b 100644
--- a/tests/implementations/where_filter/test_parse_calls.py
+++ b/tests/implementations/where_filter/test_parse_calls.py
@@ -23,8 +23,8 @@ def test_extract_dimension_call_parameter_sets() -> None:  # noqa: D
     parse_result = PydanticWhereFilter(
         where_sql_template=(
             """\
-                {{ dimension('booking__is_instant') }} \
-                AND {{ dimension('user__country', entity_path=['listing']) }} == 'US'\
+                {{ Dimension('booking__is_instant') }} \
+                AND {{ Dimension('user__country', entity_path=['listing']) }} == 'US'\
                 """
         )
     ).call_parameter_sets
@@ -50,7 +50,7 @@ def test_extract_dimension_call_parameter_sets() -> None:  # noqa: D
 def test_extract_time_dimension_call_parameter_sets() -> None:  # noqa: D
     parse_result = PydanticWhereFilter(
         where_sql_template=(
-            """{{ time_dimension('user__created_at', 'month', entity_path=['listing']) }} = '2020-01-01'"""
+            """{{ TimeDimension('user__created_at', 'month', entity_path=['listing']) }} = '2020-01-01'"""
         )
     ).call_parameter_sets
 
@@ -70,7 +70,7 @@ def test_extract_time_dimension_call_parameter_sets() -> None:  # noqa: D
 
 def test_extract_metric_time_dimension_call_parameter_sets() -> None:  # noqa: D
     parse_result = PydanticWhereFilter(
-        where_sql_template=("""{{ time_dimension('metric_time', 'month') }} = '2020-01-01'""")
+        where_sql_template=("""{{ TimeDimension('metric_time', 'month') }} = '2020-01-01'""")
     ).call_parameter_sets
 
     assert parse_result == FilterCallParameterSets(
@@ -87,7 +87,7 @@ def test_extract_metric_time_dimension_call_parameter_sets() -> None:  # noqa: D
 def test_extract_entity_call_parameter_sets() -> None:  # noqa: D
     parse_result = PydanticWhereFilter(
         where_sql_template=(
-            """{{ entity('listing') }} AND {{ entity('user', entity_path=['listing']) }} == 'TEST_USER_ID'"""
+            """{{ Entity('listing') }} AND {{ Entity('user', entity_path=['listing']) }} == 'TEST_USER_ID'"""
         )
     ).call_parameter_sets