diff --git a/packages/x-data-grid/src/components/GridPagination.tsx b/packages/x-data-grid/src/components/GridPagination.tsx
index 495d57d7ee024..8d117112208d6 100644
--- a/packages/x-data-grid/src/components/GridPagination.tsx
+++ b/packages/x-data-grid/src/components/GridPagination.tsx
@@ -17,6 +17,7 @@ import {
 
 const GridPaginationRoot = styled(TablePagination)(({ theme }) => ({
   maxHeight: 'calc(100% + 1px)', // border width
+  flexGrow: 1,
   [`& .${tablePaginationClasses.selectLabel}`]: {
     display: 'none',
     [theme.breakpoints.up('sm')]: {