diff --git a/dist/commonjs/Parser.d.ts b/dist/commonjs/Parser.d.ts
index b6176744e7d9f1f115efda5f051bde13be565f91..f258d6a5b8b86650281f6c3cb922acff62c8332e 100644
--- a/dist/commonjs/Parser.d.ts
+++ b/dist/commonjs/Parser.d.ts
@@ -41,6 +41,15 @@ export interface ParserOptions {
      * @default xmlMode
      */
     recognizeSelfClosing?: boolean;
+    /**
+     * Seeds the parser's foreign-context stack.
+     *
+     * Pass `true` to parse markup as though it were already inside a foreign
+     * context such as `<svg>`, or provide the full stack explicitly.
+     *
+     * @default [xmlMode]
+     */
+    startingForeignContext?: boolean | boolean[];
     /**
      * Allows the default tokenizer to be overwritten.
      */
diff --git a/dist/commonjs/Parser.js b/dist/commonjs/Parser.js
index 0c4a58c8268ba2f94e685c34c45213dcab6b11f2..c214209ed0cf56c239dbf6e03353f7e07d86c6a2 100644
--- a/dist/commonjs/Parser.js
+++ b/dist/commonjs/Parser.js
@@ -132,6 +132,18 @@ const htmlIntegrationElements = new Set([
     "title",
 ]);
 const reNameEnd = /\s|\//;
+function getInitialForeignContext(options, htmlMode) {
+    const { startingForeignContext } = options;
+    if (Array.isArray(startingForeignContext)) {
+        return startingForeignContext.length > 0
+            ? [...startingForeignContext]
+            : [!htmlMode];
+    }
+    if (typeof startingForeignContext === "boolean") {
+        return [startingForeignContext];
+    }
+    return [!htmlMode];
+}
 class Parser {
     constructor(cbs, options = {}) {
         var _a, _b, _c, _d, _e, _f;
@@ -164,7 +176,7 @@ class Parser {
         this.recognizeSelfClosing =
             (_c = options.recognizeSelfClosing) !== null && _c !== void 0 ? _c : !this.htmlMode;
         this.tokenizer = new ((_d = options.Tokenizer) !== null && _d !== void 0 ? _d : Tokenizer_js_1.default)(this.options, this);
-        this.foreignContext = [!this.htmlMode];
+        this.foreignContext = getInitialForeignContext(options, this.htmlMode);
         (_f = (_e = this.cbs).onparserinit) === null || _f === void 0 ? void 0 : _f.call(_e, this);
     }
     // Tokenizer event handlers
@@ -422,7 +434,7 @@ class Parser {
         (_d = (_c = this.cbs).onparserinit) === null || _d === void 0 ? void 0 : _d.call(_c, this);
         this.buffers.length = 0;
         this.foreignContext.length = 0;
-        this.foreignContext.unshift(!this.htmlMode);
+        this.foreignContext.push(...getInitialForeignContext(this.options, this.htmlMode));
         this.bufferOffset = 0;
         this.writeIndex = 0;
         this.ended = false;
diff --git a/dist/esm/Parser.d.ts b/dist/esm/Parser.d.ts
index b6176744e7d9f1f115efda5f051bde13be565f91..f258d6a5b8b86650281f6c3cb922acff62c8332e 100644
--- a/dist/esm/Parser.d.ts
+++ b/dist/esm/Parser.d.ts
@@ -41,6 +41,15 @@ export interface ParserOptions {
      * @default xmlMode
      */
     recognizeSelfClosing?: boolean;
+    /**
+     * Seeds the parser's foreign-context stack.
+     *
+     * Pass `true` to parse markup as though it were already inside a foreign
+     * context such as `<svg>`, or provide the full stack explicitly.
+     *
+     * @default [xmlMode]
+     */
+    startingForeignContext?: boolean | boolean[];
     /**
      * Allows the default tokenizer to be overwritten.
      */
diff --git a/dist/esm/Parser.js b/dist/esm/Parser.js
index a7c02e75c9513d11916df3f5cf98f47a2066ea4a..7b333c31694bc75180fd153f54a6da52393e860a 100644
--- a/dist/esm/Parser.js
+++ b/dist/esm/Parser.js
@@ -96,6 +96,18 @@ const htmlIntegrationElements = new Set([
     "title",
 ]);
 const reNameEnd = /\s|\//;
+function getInitialForeignContext(options, htmlMode) {
+    const { startingForeignContext } = options;
+    if (Array.isArray(startingForeignContext)) {
+        return startingForeignContext.length > 0
+            ? [...startingForeignContext]
+            : [!htmlMode];
+    }
+    if (typeof startingForeignContext === "boolean") {
+        return [startingForeignContext];
+    }
+    return [!htmlMode];
+}
 export class Parser {
     constructor(cbs, options = {}) {
         var _a, _b, _c, _d, _e, _f;
@@ -128,7 +140,7 @@ export class Parser {
         this.recognizeSelfClosing =
             (_c = options.recognizeSelfClosing) !== null && _c !== void 0 ? _c : !this.htmlMode;
         this.tokenizer = new ((_d = options.Tokenizer) !== null && _d !== void 0 ? _d : Tokenizer)(this.options, this);
-        this.foreignContext = [!this.htmlMode];
+        this.foreignContext = getInitialForeignContext(options, this.htmlMode);
         (_f = (_e = this.cbs).onparserinit) === null || _f === void 0 ? void 0 : _f.call(_e, this);
     }
     // Tokenizer event handlers
@@ -386,7 +398,7 @@ export class Parser {
         (_d = (_c = this.cbs).onparserinit) === null || _d === void 0 ? void 0 : _d.call(_c, this);
         this.buffers.length = 0;
         this.foreignContext.length = 0;
-        this.foreignContext.unshift(!this.htmlMode);
+        this.foreignContext.push(...getInitialForeignContext(this.options, this.htmlMode));
         this.bufferOffset = 0;
         this.writeIndex = 0;
         this.ended = false;
diff --git a/src/Parser.ts b/src/Parser.ts
index ee390c11b6e806c3a4595e248a1f51eef4040d45..4428cd91fe2a42c67c51fe33f80594b11e943c43 100644
--- a/src/Parser.ts
+++ b/src/Parser.ts
@@ -149,6 +149,16 @@ export interface ParserOptions {
      */
     recognizeSelfClosing?: boolean;
 
+    /**
+     * Seeds the parser's foreign-context stack.
+     *
+     * Pass `true` to parse markup as though it were already inside a foreign
+     * context such as `<svg>`, or provide the full stack explicitly.
+     *
+     * @default [xmlMode]
+     */
+    startingForeignContext?: boolean | boolean[];
+
     /**
      * Allows the default tokenizer to be overwritten.
      */
@@ -196,6 +206,25 @@ export interface Handler {
 
 const reNameEnd = /\s|\//;
 
+function getInitialForeignContext(
+    options: ParserOptions,
+    htmlMode: boolean,
+): boolean[] {
+    const { startingForeignContext } = options;
+
+    if (Array.isArray(startingForeignContext)) {
+        return startingForeignContext.length > 0
+            ? [...startingForeignContext]
+            : [!htmlMode];
+    }
+
+    if (typeof startingForeignContext === "boolean") {
+        return [startingForeignContext];
+    }
+
+    return [!htmlMode];
+}
+
 export class Parser implements Callbacks {
     /** The start index of the last event. */
     public startIndex = 0;
@@ -244,7 +273,7 @@ export class Parser implements Callbacks {
             this.options,
             this,
         );
-        this.foreignContext = [!this.htmlMode];
+        this.foreignContext = getInitialForeignContext(options, this.htmlMode);
         this.cbs.onparserinit?.(this);
     }
 
@@ -544,7 +573,9 @@ export class Parser implements Callbacks {
         this.cbs.onparserinit?.(this);
         this.buffers.length = 0;
         this.foreignContext.length = 0;
-        this.foreignContext.unshift(!this.htmlMode);
+        this.foreignContext.push(
+            ...getInitialForeignContext(this.options, this.htmlMode),
+        );
         this.bufferOffset = 0;
         this.writeIndex = 0;
         this.ended = false;