diff --git a/src/kotlin/kotlin.contribution.ts b/src/kotlin/kotlin.contribution.ts
new file mode 100644
index 00000000..b56711f0
--- /dev/null
+++ b/src/kotlin/kotlin.contribution.ts
@@ -0,0 +1,18 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+'use strict';
+
+import { registerLanguage } from '../_.contribution';
+
+// Allow for running under nodejs/requirejs in tests
+const _monaco: typeof monaco = (typeof monaco === 'undefined' ? (<any>self).monaco : monaco);
+
+registerLanguage({
+	id: 'kotlin',
+	extensions: ['.kt'],
+	aliases: ['Kotlin', 'kotlin'],
+	mimetypes: ['text/x-kotlin-source', 'text/x-kotlin'],
+	loader: () => _monaco.Promise.wrap(import('./kotlin'))
+});
diff --git a/src/kotlin/kotlin.ts b/src/kotlin/kotlin.ts
new file mode 100644
index 00000000..82e166b6
--- /dev/null
+++ b/src/kotlin/kotlin.ts
@@ -0,0 +1,209 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import IRichLanguageConfiguration = monaco.languages.LanguageConfiguration;
+import ILanguage = monaco.languages.IMonarchLanguage;
+
+export const conf: IRichLanguageConfiguration = {
+	// the default separators except `@$`
+	wordPattern: /(-?\d*\.\d\w*)|([^\`\~\!\#\%\^\&\*\(\)\-\=\+\[\{\]\}\\\|\;\:\'\"\,\.\<\>\/\?\s]+)/g,
+	comments: {
+		lineComment: '//',
+		blockComment: ['/*', '*/'],
+	},
+	brackets: [
+		['{', '}'],
+		['[', ']'],
+		['(', ')'],
+	],
+	autoClosingPairs: [
+		{ open: '{', close: '}' },
+		{ open: '[', close: ']' },
+		{ open: '(', close: ')' },
+		{ open: '"', close: '"' },
+		{ open: '\'', close: '\'' },
+	],
+	surroundingPairs: [
+		{ open: '{', close: '}' },
+		{ open: '[', close: ']' },
+		{ open: '(', close: ')' },
+		{ open: '"', close: '"' },
+		{ open: '\'', close: '\'' },
+		{ open: '<', close: '>' },
+	],
+	folding: {
+		markers: {
+			start: new RegExp("^\\s*//\\s*(?:(?:#?region\\b)|(?:<editor-fold\\b))"),
+			end: new RegExp("^\\s*//\\s*(?:(?:#?endregion\\b)|(?:</editor-fold>))")
+		}
+	}
+};
+
+export const language = <ILanguage>{
+	defaultToken: '',
+	tokenPostfix: '.java',
+
+	keywords: [
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+		'',
+
+	],
+
+	operators: [
+		'=', '>', '<', '!', '~', '?', ':',
+		'==', '<=', '>=', '!=', '&&', '||', '++', '--',
+		'+', '-', '*', '/', '&', '|', '^', '%', '<<',
+		'>>', '>>>', '+=', '-=', '*=', '/=', '&=', '|=',
+		'^=', '%=', '<<=', '>>=', '>>>='
+	],
+
+	// we include these common regular expressions
+	symbols: /[=><!~?:&|+\-*\/\^%]+/,
+	escapes: /\\(?:[abfnrtv\\"']|x[0-9A-Fa-f]{1,4}|u[0-9A-Fa-f]{4}|U[0-9A-Fa-f]{8})/,
+	digits: /\d+(_+\d+)*/,
+	octaldigits: /[0-7]+(_+[0-7]+)*/,
+	binarydigits: /[0-1]+(_+[0-1]+)*/,
+	hexdigits: /[[0-9a-fA-F]+(_+[0-9a-fA-F]+)*/,
+
+	// The main tokenizer for our languages
+	tokenizer: {
+		root: [
+			// identifiers and keywords
+			[/[a-zA-Z_$][\w$]*/, {
+				cases: {
+					'@keywords': { token: 'keyword.$0' },
+					'@default': 'identifier'
+				}
+			}],
+
+			// whitespace
+			{ include: '@whitespace' },
+
+			// delimiters and operators
+			[/[{}()\[\]]/, '@brackets'],
+			[/[<>](?!@symbols)/, '@brackets'],
+			[/@symbols/, {
+				cases: {
+					'@operators': 'delimiter',
+					'@default': ''
+				}
+			}],
+
+			// @ annotations.
+			[/@\s*[a-zA-Z_\$][\w\$]*/, 'annotation'],
+
+			// numbers
+			[/(@digits)[eE]([\-+]?(@digits))?[fFdD]?/, 'number.float'],
+			[/(@digits)\.(@digits)([eE][\-+]?(@digits))?[fFdD]?/, 'number.float'],
+			[/0[xX](@hexdigits)[Ll]?/, 'number.hex'],
+			[/0(@octaldigits)[Ll]?/, 'number.octal'],
+			[/0[bB](@binarydigits)[Ll]?/, 'number.binary'],
+			[/(@digits)[fFdD]/, 'number.float'],
+			[/(@digits)[lL]?/, 'number'],
+
+			// delimiter: after number because of .\d floats
+			[/[;,.]/, 'delimiter'],
+
+			// strings
+			[/"([^"\\]|\\.)*$/, 'string.invalid'],  // non-teminated string
+			[/"/, 'string', '@string'],
+
+			// characters
+			[/'[^\\']'/, 'string'],
+			[/(')(@escapes)(')/, ['string', 'string.escape', 'string']],
+			[/'/, 'string.invalid']
+		],
+
+		whitespace: [
+			[/[ \t\r\n]+/, ''],
+			[/\/\*\*(?!\/)/, 'comment.doc', '@javadoc'],
+			[/\/\*/, 'comment', '@comment'],
+			[/\/\/.*$/, 'comment'],
+		],
+
+		comment: [
+			[/[^\/*]+/, 'comment'],
+			// [/\/\*/, 'comment', '@push' ],    // nested comment not allowed :-(
+			// [/\/\*/,    'comment.invalid' ],    // this breaks block comments in the shape of /* //*/
+			[/\*\//, 'comment', '@pop'],
+			[/[\/*]/, 'comment']
+		],
+		//Identical copy of comment above, except for the addition of .doc
+		javadoc: [
+			[/[^\/*]+/, 'comment.doc'],
+			// [/\/\*/, 'comment.doc', '@push' ],    // nested comment not allowed :-(
+			[/\/\*/, 'comment.doc.invalid'],
+			[/\*\//, 'comment.doc', '@pop'],
+			[/[\/*]/, 'comment.doc']
+		],
+
+		string: [
+			[/[^\\"]+/, 'string'],
+			[/@escapes/, 'string.escape'],
+			[/\\./, 'string.escape.invalid'],
+			[/"/, 'string', '@pop']
+		],
+	},
+};