diff --git a/python/cudf/cudf/core/groupby/groupby.py b/python/cudf/cudf/core/groupby/groupby.py
index 1f08abdc7fc..78593f20421 100644
--- a/python/cudf/cudf/core/groupby/groupby.py
+++ b/python/cudf/cudf/core/groupby/groupby.py
@@ -2640,6 +2640,8 @@ def agg(self, func):
 
         return result
 
+    aggregate = agg
+
     def apply(self, func, *args):
         result = super().apply(func, *args)
 
diff --git a/python/cudf/cudf/tests/groupby/test_agg.py b/python/cudf/cudf/tests/groupby/test_agg.py
index 7919ee4a9f1..f8847f02d5a 100644
--- a/python/cudf/cudf/tests/groupby/test_agg.py
+++ b/python/cudf/cudf/tests/groupby/test_agg.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2023, NVIDIA CORPORATION.
+# Copyright (c) 2023-2024, NVIDIA CORPORATION.
 import numpy as np
 import pytest
 
@@ -16,3 +16,13 @@ def test_agg_count_dtype(empty):
         df = df.iloc[:0]
     result = df.groupby("a").agg({"c": "count"})
     assert result["c"].dtype == np.dtype("int64")
+
+
+@pytest.mark.parametrize("attr", ["agg", "aggregate"])
+def test_series_agg(attr):
+    df = cudf.DataFrame({"a": [1, 2, 1, 2], "b": [0, 0, 0, 0]})
+    pdf = df.to_pandas()
+    agg = getattr(df.groupby("a")["a"], attr)("count")
+    pd_agg = getattr(pdf.groupby(["a"])["a"], attr)("count")
+
+    assert agg.ndim == pd_agg.ndim