diff --git a/.changeset/three-vans-join.md b/.changeset/three-vans-join.md
new file mode 100644
index 00000000000..09fc482ae1b
--- /dev/null
+++ b/.changeset/three-vans-join.md
@@ -0,0 +1,5 @@
+---
+'@primer/react': major
+---
+
+Update ProgressBar to no longer support sx
diff --git a/packages/react/src/ProgressBar/ProgressBar.tsx b/packages/react/src/ProgressBar/ProgressBar.tsx
index c0b0975f8a7..4f6f9a117ee 100644
--- a/packages/react/src/ProgressBar/ProgressBar.tsx
+++ b/packages/react/src/ProgressBar/ProgressBar.tsx
@@ -1,8 +1,6 @@
 import React, {forwardRef} from 'react'
-import type {SxProp} from '../sx'
 import {clsx} from 'clsx'
 import classes from './ProgressBar.module.css'
-import {BoxWithFallback} from '../internal/components/BoxWithFallback'
 
 type ProgressProp = {
   className?: string
@@ -14,13 +12,12 @@ type StyledProgressContainerProps = {
   inline?: boolean
   barSize?: 'small' | 'default' | 'large'
   animated?: boolean
-} & SxProp
+}
 
 export type ProgressBarItemProps = React.HTMLAttributes<HTMLSpanElement> & {
   'aria-label'?: string
   className?: string
-} & ProgressProp &
-  SxProp
+} & ProgressProp
 
 export const Item = forwardRef<HTMLSpanElement, ProgressBarItemProps>(
   (
@@ -56,14 +53,12 @@ export const Item = forwardRef<HTMLSpanElement, ProgressBarItemProps>(
       (bgType && `var(--bgColor-${bgType[0]}-${bgType[1] || 'emphasis'})`) || 'var(--bgColor-success-emphasis)'
 
     return (
-      <BoxWithFallback
-        as="span"
+      <span
         className={clsx(className, classes.ProgressBarItem)}
         {...rest}
         role="progressbar"
         aria-label={ariaLabel}
         ref={forwardRef}
-        progress={progress}
         style={{...styles, ...style}}
         {...ariaAttributes}
       />
@@ -105,8 +100,7 @@ export const ProgressBar = forwardRef<HTMLSpanElement, ProgressBarProps>(
     const validChildren = React.Children.toArray(children).length
 
     return (
-      <BoxWithFallback
-        as="span"
+      <span
         ref={forwardRef}
         className={clsx(className, classes.ProgressBarContainer)}
         data-progress-display={inline ? 'inline' : 'block'}
@@ -125,7 +119,7 @@ export const ProgressBar = forwardRef<HTMLSpanElement, ProgressBarProps>(
             bg={bg}
           />
         )}
-      </BoxWithFallback>
+      </span>
     )
   },
 )
diff --git a/packages/styled-react/src/__tests__/__snapshots__/exports.test.ts.snap b/packages/styled-react/src/__tests__/__snapshots__/exports.test.ts.snap
index fbb4eb59ca8..3cef707a5e0 100644
--- a/packages/styled-react/src/__tests__/__snapshots__/exports.test.ts.snap
+++ b/packages/styled-react/src/__tests__/__snapshots__/exports.test.ts.snap
@@ -28,7 +28,6 @@ exports[`@primer/styled-react exports 1`] = `
   "Overlay",
   "PageHeader",
   "PageLayout",
-  "ProgressBar",
   "RadioGroup",
   "RelativeTime",
   "SegmentedControl",
diff --git a/packages/styled-react/src/__tests__/primer-react.browser.test.tsx b/packages/styled-react/src/__tests__/primer-react.browser.test.tsx
index 2b061a08546..ab95baeada7 100644
--- a/packages/styled-react/src/__tests__/primer-react.browser.test.tsx
+++ b/packages/styled-react/src/__tests__/primer-react.browser.test.tsx
@@ -27,7 +27,6 @@ import {
   Overlay,
   PageHeader,
   PageLayout,
-  ProgressBar,
   RadioGroup,
   RelativeTime,
   SegmentedControl,
@@ -286,16 +285,6 @@ describe('@primer/react', () => {
     expect(window.getComputedStyle(container.firstElementChild!).backgroundColor).toBe('rgb(255, 0, 0)')
   })
 
-  test('ProgressBar supports `sx` prop', () => {
-    const {container} = render(<ProgressBar data-testid="component" sx={{background: 'red'}} />)
-    expect(window.getComputedStyle(container.firstElementChild!).backgroundColor).toBe('rgb(255, 0, 0)')
-  })
-
-  test('ProgressBar.Item supports `sx` prop', () => {
-    const {container} = render(<ProgressBar.Item data-testid="component" sx={{background: 'red'}} />)
-    expect(window.getComputedStyle(container.firstElementChild!).backgroundColor).toBe('rgb(255, 0, 0)')
-  })
-
   test('RadioGroup supports `sx` prop', () => {
     const {container} = render(
       <RadioGroup data-testid="component" name="test" sx={{background: 'red'}}>
diff --git a/packages/styled-react/src/index.tsx b/packages/styled-react/src/index.tsx
index 621ffec54fd..fd9659e627a 100644
--- a/packages/styled-react/src/index.tsx
+++ b/packages/styled-react/src/index.tsx
@@ -237,7 +237,6 @@ export {
   Overlay,
   PageHeader,
   PageLayout,
-  ProgressBar,
   Select,
   Spinner,
   Text,