The group consists of twelve members: Frankie Chan, Alton Wong, Lokman Yeung, Stanley Yau, Anson Kong, Jer Lau, Ian Chan, Anson Lo, Jeremy Lee, Edan Lui, Keung To, and Tiger Yau.

Mirror is considered one of the driving forces in the renewed interest of the Cantopop genre and to have prompted an unprecedented wave of fandom culture in Hong Kong.

In July 2018, ViuTV's reality talent competition Good Night Show - King Maker started scouting for potential artistes.

[10] Mirror officially debuted on 3 November 2018 with twelve members,[11][12] with King Maker's producer, Ahfa Wong as the group's manager.

[5] Originally, Mirror had planned to hold a concert in 2020 to mark the second anniversary of their debut, but it was postponed due to the COVID-19 pandemic.

The postponed concert was eventually announced to be held from 6 to 8 May 2021, titled MIRROR "ONE AND ALL" LIVE 2021, at Kowloon Bay International Trade & Exhibition Centre - Star Hall.

In March 2022, Edan confirmed in an interview that Mirror would be headlining a concert at the Hong Kong Coliseum in Summer 2022.

On 28 July 2022, during the fourth of the twelve planned shows at the Hong Kong Coliseum, a large overhead video screen fell down onto backup dancer, Moses "Mo" Li Kai-yin, 27, leaving him in critical condition.

[26] The accident also left a second backup dancer injured, Chang Tsz-fung, who had injuries to his pelvis and cervical spine.

Safety concerns had already been raised early on after dancer, Zisac Law Tak-chi, was reportedly injured during rehearsal, and member of Mirror, Frankie Chan, fell off stage two days prior to the accident.

On 8 January 2023, Mirror was invited by internationally renowned DJ, Alan Walker, to perform as special guest at his Hong Kong show, as part of his Walkerverse tour.

[40] An official press conference held on 18 December 2023 further unveiled the cities of Macau, Singapore, Kuala Lumpur, London, Manchester, Los Angeles, San Francisco, New York and Toronto to be part of the upcoming tour.

On 5 April 2024, Mirror released their second English single, "Day 0", which features NBA star Damian Lillard (Dame D.O.L.L.A.).

[45] The group subsequently promoted the song on Good Day New York and CNN, marking their first official appearance on American television.

In the show, members of the group played games in different parts of Hong Kong, including Ocean Park and Wu Kwai Sha Youth Village, while other episodes were filmed in Macau, Thailand and South Korea.

[48][49][50] Lokman said that the show was intended to resemble the South Korean programme Running Man, to provide members with opportunities to overcome challenges, live under the same roof and bond with each other as a group.

It is the first television drama that starred all members of Mirror, with seven of them composing the main cast, including Ian, Anson Lo, Edan, Jer, Tiger, Alton and Jeremy.

[59][60] In June 2021, Edan, Anson Lo, and Stanley starred in the Hong Kong adaptation of the Japanese series Ossan's Love with actor Kenny Wong.

[69][70] On 8 September 2021, it was announced Anson Lo and Edan were to join the Bvlgari Family and to star as brand ambassadors for their B.zero1 jewellery collections.

[74] Good Night Show - King Maker (陳瑞輝) (王智德) (楊樂文) (邱士縉) (江𤒹生) (柳應廷) (陳卓賢) (盧瀚霆) (李駿傑) (呂爵安) (姜濤) (邱傲然) Halted on 28 July due to concert accident[104][105][106] Mirror have been described by local and international media as "the new kings of Cantopop",[112] and a "Cantopop phenomenon".

[114] Mirror's appeal in Hong Kong transcends demographics, and the group is regarded as a "symbol of hope" in a city struggling with political upheaval and the COVID-19 pandemic.