diff --git a/docs/pages/api-docs/accordion-actions.json b/docs/pages/api-docs/accordion-actions.json
index 5213ad669034f0..8bac62912da24f 100644
--- a/docs/pages/api-docs/accordion-actions.json
+++ b/docs/pages/api-docs/accordion-actions.json
@@ -2,7 +2,8 @@
   "props": {
     "children": { "type": { "name": "node" } },
     "classes": { "type": { "name": "object" } },
-    "disableSpacing": { "type": { "name": "bool" } }
+    "disableSpacing": { "type": { "name": "bool" } },
+    "sx": { "type": { "name": "object" } }
   },
   "name": "AccordionActions",
   "styles": { "classes": ["root", "spacing"], "globalClasses": {}, "name": "MuiAccordionActions" },
@@ -11,6 +12,6 @@
   "filename": "/packages/material-ui/src/AccordionActions/AccordionActions.js",
   "inheritance": null,
   "demos": "<ul><li><a href=\"/components/accordion/\">Accordion</a></li></ul>",
-  "styledComponent": false,
+  "styledComponent": true,
   "cssComponent": false
 }
diff --git a/docs/translations/api-docs/accordion-actions/accordion-actions.json b/docs/translations/api-docs/accordion-actions/accordion-actions.json
index 52b117283775a2..3d3e91923f6c1f 100644
--- a/docs/translations/api-docs/accordion-actions/accordion-actions.json
+++ b/docs/translations/api-docs/accordion-actions/accordion-actions.json
@@ -3,7 +3,8 @@
   "propDescriptions": {
     "children": "The content of the component.",
     "classes": "Override or extend the styles applied to the component. See <a href=\"#css\">CSS API</a> below for more details.",
-    "disableSpacing": "If <code>true</code>, the actions do not have additional margin."
+    "disableSpacing": "If <code>true</code>, the actions do not have additional margin.",
+    "sx": "The system prop that allows defining system overrides as well as additional CSS styles. See the <a href=\"/system/basics/#the-sx-prop\">`sx` page</a> for more details."
   },
   "classDescriptions": {
     "root": { "description": "Styles applied to the root element." },
diff --git a/packages/material-ui/src/AccordionActions/AccordionActions.d.ts b/packages/material-ui/src/AccordionActions/AccordionActions.d.ts
index 34baee1ff3246c..ee12853b9721b0 100644
--- a/packages/material-ui/src/AccordionActions/AccordionActions.d.ts
+++ b/packages/material-ui/src/AccordionActions/AccordionActions.d.ts
@@ -1,5 +1,6 @@
 import * as React from 'react';
-import { InternalStandardProps as StandardProps } from '..';
+import { SxProps } from '@material-ui/system';
+import { InternalStandardProps as StandardProps, Theme } from '..';
 
 export interface AccordionActionsProps extends StandardProps<React.HTMLAttributes<HTMLDivElement>> {
   /**
@@ -20,6 +21,10 @@ export interface AccordionActionsProps extends StandardProps<React.HTMLAttribute
    * @default false
    */
   disableSpacing?: boolean;
+  /**
+   * The system prop that allows defining system overrides as well as additional CSS styles.
+   */
+  sx?: SxProps<Theme>;
 }
 
 export type AccordionActionsClassKey = keyof NonNullable<AccordionActionsProps['classes']>;
diff --git a/packages/material-ui/src/AccordionActions/AccordionActions.js b/packages/material-ui/src/AccordionActions/AccordionActions.js
index d425275d2e54d3..367b0a0b6b4828 100644
--- a/packages/material-ui/src/AccordionActions/AccordionActions.js
+++ b/packages/material-ui/src/AccordionActions/AccordionActions.js
@@ -1,31 +1,64 @@
 import * as React from 'react';
 import PropTypes from 'prop-types';
 import clsx from 'clsx';
-import withStyles from '../styles/withStyles';
+import { deepmerge } from '@material-ui/utils';
+import { unstable_composeClasses as composeClasses } from '@material-ui/unstyled';
+import experimentalStyled from '../styles/experimentalStyled';
+import useThemeProps from '../styles/useThemeProps';
+import { getAccordionActionsUtilityClass } from './accordionActionsClasses';
 
-export const styles = {
-  /* Styles applied to the root element. */
-  root: {
-    display: 'flex',
-    alignItems: 'center',
-    padding: 8,
-    justifyContent: 'flex-end',
+const overridesResolver = (props, styles) => {
+  const { styleProps } = props;
+
+  return deepmerge(styles.root || {}, {
+    ...(!styleProps.disableSpacing && styles.spacing),
+  });
+};
+
+const useUtilityClasses = (styleProps) => {
+  const { classes, disableSpacing } = styleProps;
+
+  const slots = {
+    root: ['root', !disableSpacing && 'spacing'],
+  };
+
+  return composeClasses(slots, getAccordionActionsUtilityClass, classes);
+};
+
+const AccordionActionsRoot = experimentalStyled(
+  'div',
+  {},
+  {
+    name: 'MuiAccordionActions',
+    slot: 'Root',
+    overridesResolver,
   },
+)(({ styleProps }) => ({
+  /* Styles applied to the root element. */
+  display: 'flex',
+  alignItems: 'center',
+  padding: 8,
+  justifyContent: 'flex-end',
   /* Styles applied to the root element unless `disableSpacing={true}`. */
-  spacing: {
-    '& > :not(:first-child)': {
+  ...(!styleProps.disableSpacing && {
+    '& > :not(:first-of-type)': {
       marginLeft: 8,
     },
-  },
-};
+  }),
+}));
 
-const AccordionActions = React.forwardRef(function AccordionActions(props, ref) {
-  const { classes, className, disableSpacing = false, ...other } = props;
+const AccordionActions = React.forwardRef(function AccordionActions(inProps, ref) {
+  const props = useThemeProps({ props: inProps, name: 'MuiAccordionActions' });
+  const { className, disableSpacing = false, ...other } = props;
+  const styleProps = { ...props, disableSpacing };
+
+  const classes = useUtilityClasses(styleProps);
 
   return (
-    <div
-      className={clsx(classes.root, { [classes.spacing]: !disableSpacing }, className)}
+    <AccordionActionsRoot
+      className={clsx(classes.root, className)}
       ref={ref}
+      styleProps={styleProps}
       {...other}
     />
   );
@@ -53,6 +86,10 @@ AccordionActions.propTypes = {
    * @default false
    */
   disableSpacing: PropTypes.bool,
+  /**
+   * The system prop that allows defining system overrides as well as additional CSS styles.
+   */
+  sx: PropTypes.object,
 };
 
-export default withStyles(styles, { name: 'MuiAccordionActions' })(AccordionActions);
+export default AccordionActions;
diff --git a/packages/material-ui/src/AccordionActions/AccordionActions.test.js b/packages/material-ui/src/AccordionActions/AccordionActions.test.js
index cee1de671d2a4b..b5a58a8249ccb1 100644
--- a/packages/material-ui/src/AccordionActions/AccordionActions.test.js
+++ b/packages/material-ui/src/AccordionActions/AccordionActions.test.js
@@ -1,20 +1,18 @@
 import * as React from 'react';
-import { getClasses, createMount, describeConformance } from 'test/utils';
+import { createMount, describeConformanceV5 } from 'test/utils';
 import AccordionActions from './AccordionActions';
+import classes from './accordionActionsClasses';
 
 describe('<AccordionActions />', () => {
   const mount = createMount();
-  let classes;
 
-  before(() => {
-    classes = getClasses(<AccordionActions>foo</AccordionActions>);
-  });
-
-  describeConformance(<AccordionActions>Conformance</AccordionActions>, () => ({
+  describeConformanceV5(<AccordionActions>Conformance</AccordionActions>, () => ({
     classes,
     inheritComponent: 'div',
     mount,
     refInstanceof: window.HTMLDivElement,
-    skip: ['componentProp'],
+    muiName: 'MuiAccordionActions',
+    testVariantProps: { disableSpacing: true },
+    skip: ['componentProp', 'componentsProp'],
   }));
 });
diff --git a/packages/material-ui/src/AccordionActions/accordionActionsClasses.d.ts b/packages/material-ui/src/AccordionActions/accordionActionsClasses.d.ts
new file mode 100644
index 00000000000000..ef4402339bd098
--- /dev/null
+++ b/packages/material-ui/src/AccordionActions/accordionActionsClasses.d.ts
@@ -0,0 +1,10 @@
+export interface AccordionActionsClasses {
+  root: string;
+  spacing: string;
+}
+
+declare const accordionActionsClasses: AccordionActionsClasses;
+
+export function getAccordionActionsUtilityClass(slot: string): string;
+
+export default accordionActionsClasses;
diff --git a/packages/material-ui/src/AccordionActions/accordionActionsClasses.js b/packages/material-ui/src/AccordionActions/accordionActionsClasses.js
new file mode 100644
index 00000000000000..076f1be91d6da2
--- /dev/null
+++ b/packages/material-ui/src/AccordionActions/accordionActionsClasses.js
@@ -0,0 +1,9 @@
+import { generateUtilityClass, generateUtilityClasses } from '@material-ui/unstyled';
+
+export function getAccordionActionsUtilityClass(slot) {
+  return generateUtilityClass('MuiAccordionActions', slot);
+}
+
+const accordionActionsClasses = generateUtilityClasses('MuiAccordionActions', ['root', 'spacing']);
+
+export default accordionActionsClasses;
diff --git a/packages/material-ui/src/AccordionActions/index.d.ts b/packages/material-ui/src/AccordionActions/index.d.ts
index f5b4b351fca1f0..7c2bf2d04d5b70 100644
--- a/packages/material-ui/src/AccordionActions/index.d.ts
+++ b/packages/material-ui/src/AccordionActions/index.d.ts
@@ -1,2 +1,5 @@
 export { default } from './AccordionActions';
 export * from './AccordionActions';
+
+export { default as accordionActionsClasses } from './accordionActionsClasses';
+export * from './accordionActionsClasses';
diff --git a/packages/material-ui/src/AccordionActions/index.js b/packages/material-ui/src/AccordionActions/index.js
index 929ebfd5671c2f..a3292ff6ef4ed3 100644
--- a/packages/material-ui/src/AccordionActions/index.js
+++ b/packages/material-ui/src/AccordionActions/index.js
@@ -1 +1,4 @@
 export { default } from './AccordionActions';
+
+export { default as accordionActionsClasses } from './accordionActionsClasses';
+export * from './accordionActionsClasses';