diff --git a/.changeset/good-cars-roll.md b/.changeset/good-cars-roll.md
new file mode 100644
index 000000000..6707f28e2
--- /dev/null
+++ b/.changeset/good-cars-roll.md
@@ -0,0 +1,10 @@
+---
+'@emotion/native': patch
+'@emotion/styled': patch
+---
+
+pr: #2759
+author: @srmagura
+author: @Andarist
+
+Change the argument of the `shouldForwardProp` option of `styled` from `PropertyKey` to `string` in the TypeScript definitions.
diff --git a/.changeset/purple-ladybugs-think.md b/.changeset/purple-ladybugs-think.md
new file mode 100644
index 000000000..148f64d7e
--- /dev/null
+++ b/.changeset/purple-ladybugs-think.md
@@ -0,0 +1,8 @@
+---
+'@emotion/is-prop-valid': patch
+---
+
+pr: #2759
+author: @srmagura
+
+Change the type of the argument to `isPropValid` from `PropertyKey` to `string` in the TypeScript definitions.
diff --git a/packages/is-prop-valid/types/index.d.ts b/packages/is-prop-valid/types/index.d.ts
index 2ca137567..e7d00bfdb 100644
--- a/packages/is-prop-valid/types/index.d.ts
+++ b/packages/is-prop-valid/types/index.d.ts
@@ -1,5 +1,5 @@
 // Definitions by: Junyoung Clare Jang <https://github.com/Ailrun>
 // TypeScript Version: 2.1
 
-declare function isPropValid(string: PropertyKey): boolean
+declare function isPropValid(prop: string): boolean
 export default isPropValid
diff --git a/packages/native/types/base.d.ts b/packages/native/types/base.d.ts
index f0fee1095..bd7d4d479 100644
--- a/packages/native/types/base.d.ts
+++ b/packages/native/types/base.d.ts
@@ -64,9 +64,9 @@ export type Interpolation<
  */
 export interface FilteringStyledOptions<
   Props = Record<string, any>,
-  ForwardedProps extends keyof Props = keyof Props
+  ForwardedProps extends keyof Props & string = keyof Props & string
 > {
-  shouldForwardProp?: (propName: string) => propName is ForwardedProps & string
+  shouldForwardProp?: (propName: string) => propName is ForwardedProps
 }
 
 export interface StyledOptions<Props = Record<string, any>> {
@@ -149,7 +149,8 @@ export interface CreateStyledComponent<
 export interface CreateStyled {
   <
     C extends React.ComponentClass<React.ComponentProps<C>>,
-    ForwardedProps extends keyof React.ComponentProps<C> = keyof React.ComponentProps<C>
+    ForwardedProps extends keyof React.ComponentProps<C> &
+      string = keyof React.ComponentProps<C> & string
   >(
     component: C,
     options: FilteringStyledOptions<React.ComponentProps<C>, ForwardedProps>
@@ -178,7 +179,8 @@ export interface CreateStyled {
 
   <
     C extends React.ComponentType<React.ComponentProps<C>>,
-    ForwardedProps extends keyof React.ComponentProps<C> = keyof React.ComponentProps<C>
+    ForwardedProps extends keyof React.ComponentProps<C> &
+      string = keyof React.ComponentProps<C> & string
   >(
     component: C,
     options: FilteringStyledOptions<React.ComponentProps<C>, ForwardedProps>
diff --git a/packages/styled/types/base.d.ts b/packages/styled/types/base.d.ts
index 5680fb56f..59646dee8 100644
--- a/packages/styled/types/base.d.ts
+++ b/packages/styled/types/base.d.ts
@@ -19,10 +19,10 @@ export { ComponentSelector, Interpolation }
  */
 export interface FilteringStyledOptions<
   Props = Record<string, any>,
-  ForwardedProps extends keyof Props = keyof Props
+  ForwardedProps extends keyof Props & string = keyof Props & string
 > {
   label?: string
-  shouldForwardProp?: (propName: string) => propName is ForwardedProps & string
+  shouldForwardProp?: (propName: string) => propName is ForwardedProps
   target?: string
 }
 
@@ -121,7 +121,8 @@ export interface CreateStyledComponent<
 export interface CreateStyled {
   <
     C extends React.ComponentClass<React.ComponentProps<C>>,
-    ForwardedProps extends keyof React.ComponentProps<C> = keyof React.ComponentProps<C>
+    ForwardedProps extends keyof React.ComponentProps<C> &
+      string = keyof React.ComponentProps<C> & string
   >(
     component: C,
     options: FilteringStyledOptions<React.ComponentProps<C>, ForwardedProps>
@@ -150,7 +151,8 @@ export interface CreateStyled {
 
   <
     C extends React.ComponentType<React.ComponentProps<C>>,
-    ForwardedProps extends keyof React.ComponentProps<C> = keyof React.ComponentProps<C>
+    ForwardedProps extends keyof React.ComponentProps<C> &
+      string = keyof React.ComponentProps<C> & string
   >(
     component: C,
     options: FilteringStyledOptions<React.ComponentProps<C>, ForwardedProps>
@@ -171,7 +173,8 @@ export interface CreateStyled {
 
   <
     Tag extends keyof JSX.IntrinsicElements,
-    ForwardedProps extends keyof JSX.IntrinsicElements[Tag] = keyof JSX.IntrinsicElements[Tag]
+    ForwardedProps extends keyof JSX.IntrinsicElements[Tag] &
+      string = keyof JSX.IntrinsicElements[Tag] & string
   >(
     tag: Tag,
     options: FilteringStyledOptions<JSX.IntrinsicElements[Tag], ForwardedProps>