diff --git a/stubs/openpyxl/openpyxl/utils/cell.pyi b/stubs/openpyxl/openpyxl/utils/cell.pyi
index 3a14ebc65..6fc91f158 100644
--- a/stubs/openpyxl/openpyxl/utils/cell.pyi
+++ b/stubs/openpyxl/openpyxl/utils/cell.pyi
@@ -9,17 +9,17 @@ ABSOLUTE_RE: Any
 SHEET_TITLE: str
 SHEETRANGE_RE: Any
 
-def get_column_interval(start, end): ...
-def coordinate_from_string(coord_string): ...
-def absolute_coordinate(coord_string): ...
+def get_column_interval(start: str | int, end: str | int) -> list[str]: ...
+def coordinate_from_string(coord_string: str) -> tuple[str, int]: ...
+def absolute_coordinate(coord_string: str) -> str: ...
 
 col: Any
 
-def get_column_letter(idx): ...
-def column_index_from_string(str_col): ...
-def range_boundaries(range_string): ...
+def get_column_letter(idx: int) -> str: ...
+def column_index_from_string(str_col: str) -> int: ...
+def range_boundaries(range_string: str) -> tuple[int, int, int, int]: ...
 def rows_from_range(range_string) -> Generator[Any, None, None]: ...
 def cols_from_range(range_string) -> Generator[Any, None, None]: ...
-def coordinate_to_tuple(coordinate): ...
-def range_to_tuple(range_string): ...
-def quote_sheetname(sheetname): ...
+def coordinate_to_tuple(coordinate: str) -> tuple[int, int]: ...
+def range_to_tuple(range_string: str) -> tuple[str, tuple[int, int, int, int]]: ...
+def quote_sheetname(sheetname: str) -> str: ...