Kelvin Kwan was born and raised in Canada; his father was a former executive of PolyGram and a friend of Hong Kong pop singer Alan Tam. As a result, Tam became Kwan's godfather. Also, he is the nephew of Teddy Robin. In 2004, during the summer vacation after his first year of university in Toronto, he went on a trip to Taiwan; after a night of karaoke with his father's ex-coworkers, Kwan was offered an audition, and was signed to Universal Music's Taiwan division. A year later, he moved to Hong Kong.Tam immediately took Kwan under his wing, teaching him how to face the media and deal with their queries about his personal life, which began to arise in July 2006 after he was seen attending a concert with fellow Universal Music singer Gia Lin.Tam's relationship with Kwan continued to prove a boost to Kwan's career; in August 2006, the pair recorded a music video of the duet "Big Cry Baby (???)" which secured Kwan's popularity in the Hong Kong music industry. Kwan's debut album, entitled "IF", was released on October 11, 2006. Among the songs on the album was Big Cry Baby, which only 5 days after the album's release was ranked as China's 4th most popular duet by China Central Television.

關楚耀（Kelvin Kwan），生於加拿大，籍貫廣西桂林，香港男歌手，有“譚詠麟契仔”之稱（因其父關維麟曾任譚的唱片監制，曾任寶麗金唱片高層）；另外泰迪羅賓是關楚耀的二伯父；而張敬軒是他的誼兄。

獎項

2008年 * 新城勁爆兒歌頒獎禮2008 - 兒歌金曲獎(響)

2007年 * SINA MUSIC樂壇民意指數頒獎禮2007 - Sina Music Live現場演繹大獎 * Roadshow至尊音樂頒獎典禮2007 - Roadshow至尊手機鈴聲獎（你當我什麽）、Roadshow至尊歌曲獎（你當我什麽） * 新城勁爆頒獎禮2007 - 新城勁爆歌曲獎（你當我什麽） * Yahoo搜尋人氣大獎2007 - Yahoo Music 人氣MV（你當我什麽） * Yes Idol 選舉2007 - 十大Yes Idol * PM 2007樂壇頒獎禮 - PM2007年度飛躍實力男歌手、PM2007年度飛躍歌曲演繹獎（你當我什麽）

2006年 * IFPI香港唱片銷量大獎2006 - 最暢銷本地男新人 * SINA MUSIC樂壇民意指數頒獎禮2006 - 我最喜愛的男新人 * 第二十九屆十大中文金曲頒獎音樂會 - 最有前途新人獎銅獎 * 2006年度十大勁歌金曲頒獎典禮 - 最受歡迎新人獎銀獎 * Roadshow至尊音樂頒獎典禮2006 - Roadshow至尊新人獎、Roadshow至尊合唱歌曲獎（大喊包 - 與譚詠麟合唱） * 2006年度叱咤樂壇頒獎禮* - 叱咤樂壇新力軍銅獎 * 新城勁爆頒獎禮2006 - 新城勁爆新人王（男歌手） * 2006勁歌金曲優秀選第三回 - 新人飆升歌曲獎 * 9+2音樂先鋒榜 - 新人獎、最受歡迎合唱歌（大喊包 - 與譚詠麟合唱） * 金曲金榜 - 新人銀獎 * 第18屆流行歌曲創作大賽 - 第3名（難逃一死）

電影

2007年 * 《魔術男》 飾 Amy男友Michael

2008年 * 《親愛的》 飾 勇（程緯） * 《絕代雙嬌》飾 家明