diff --git a/crates/polars-plan/src/dsl/mod.rs b/crates/polars-plan/src/dsl/mod.rs
index e8bc56d9ead9..d6b553d6a469 100644
--- a/crates/polars-plan/src/dsl/mod.rs
+++ b/crates/polars-plan/src/dsl/mod.rs
@@ -398,6 +398,7 @@ impl Expr {
 
     /// Cast expression to another data type.
     /// Throws an error if conversion had overflows.
+    /// Returns an Error if cast is invalid on rows after predicates are pushed down.
     pub fn strict_cast(self, dtype: DataType) -> Self {
         Expr::Cast {
             expr: Arc::new(self),
diff --git a/py-polars/polars/dataframe/frame.py b/py-polars/polars/dataframe/frame.py
index c0dedb35bda0..649b1b15120e 100644
--- a/py-polars/polars/dataframe/frame.py
+++ b/py-polars/polars/dataframe/frame.py
@@ -7727,8 +7727,8 @@ def cast(
             Mapping of column names (or selector) to dtypes, or a single dtype
             to which all columns will be cast.
         strict
-            Throw an error if a cast could not be done (for instance, due to an
-            overflow).
+            Raise if cast is invalid on rows after predicates are pusded down.
+            If `False`, invalid casts will produce null values.
 
         Examples
         --------
diff --git a/py-polars/polars/expr/expr.py b/py-polars/polars/expr/expr.py
index 65b483a6dafe..c993825bd223 100644
--- a/py-polars/polars/expr/expr.py
+++ b/py-polars/polars/expr/expr.py
@@ -1753,7 +1753,8 @@ def cast(
         dtype
             DataType to cast to.
         strict
-            If True invalid casts generate exceptions instead of `null`\s.
+            Raise if cast is invalid on rows after predicates are pushed down.
+            If `False`, invalid casts will produce null values.
         wrap_numerical
             If True numeric casts wrap overflowing values instead of
             marking the cast as invalid.