Monsta X is a six-member boy group under Starship Entertainment. The group was formed through the survival show "NO.MERCY" which aired on Mnet Channel from December 2014 to February 2015. By the end of the show, seven members were chosen to debut: Shownu, Wonho, Minhyuk, Kihyun, Hyungwon, Joohoney, and I.M. The group eventually made their official debut as a seven-member group on May 14, 2015, with their first mini-album "Trespass".
Their name, unlike most people think, does not refer to "monster" but to the pronunciation " Mon Sta" which refers to the French "Ma Star" which translates into "my star" in English. X stands for the infinite possibilities as the variable character in equations. The fandom is called Monbebe which also translates to "my baby" from French.
On May 17, 2017, Monsta X made their debut in Japan under Universal Music's new label Mercury Records Tokyo with their first Japanese single album, which included Japanese versions of "Hero" and "Stuck". "Hero" reached number two on the weekly Oricon Singles Chart, number one on the Tower Records chart, and number three on the weekly Billboard Japan Hot 100 chart, making an impressive debut from a foreign artist.
On January 13, 2018, the group served as torchbearers on the first day of the Seoul leg of the Olympic torch relay in the 2018 Pyeongchang Winter Olympics torch relay.
On October 31, 2019, Starship Entertainment publicly declared that member Wonho would be departing following recent allegations of owed money and assets and that the company intends to "hold legal liability" for "malicious and distorted claims" about him. Fans expressed their disapproval and requested Starship that he be reinstated in the group. Wonho was subsequently cleared of drug charges in March 2020 and was signed with a subsidiary of Starship Entertainment to pursue a solo career.