Mkrtich Aleksani Arzumanyan (; born August 10, 1976), better known as Mko () is an Armenian actor, humorist, showman, screenwriter, and producer. He was born in Artashat (Yuva). He is known from the comedy duo "Hayko Mko" (with Hayk Marutyan). The duo's most famous shows were Kargin Haghordum and Kargin Serial. Due to these, he is widely known as Kargin Mko ().
Mkrtich studied at the Russian school N23 after N.K. Krupskaya in Gyumri. After the devastating earthquake of 1988 he moved to school N14. In 1993 he entered the State Engineering University Of Armenia (Gyumri branch). In the third year of university studying, he was included in the KVN team of SEUA Gyumri branch, after which the "New Wave" KVN Group was formed, ëÃÂÃÂüÃÂýÃÂúøù ÿÃÂþõúÃÂû KVN; KVN team of Armenia is formed based on the teams' best players. He worked as an actor, TV host, scriptwriter, producer, and director.
Mkrtich starred in more than 10 movies and TV shows. The first movie which he starred in was "Our Yard" () in 1996. The first television broadcast which he starred in was a humorous project called "220 Volt" of "Sharm Holding", which has been followed by "Mut Patmutyun" project. In 2002, he started his career in "Kargin Haghordum" comedy program, which has been followed by "Kargin Serial" where he has played the role of Adik (Arkadi Karagyozyan). The famous TV show lasted 6 seasons. In 2013 he began starring in "Tnpesa" sitcom.