Marat Grigorian (Armenian: Մարատ Գրիգորյան; born 29 May 1991) is an Armenian-Belgian kickboxer currently signed to ONE Championship, where he competes in the featherweight division.

[1] After gathering funds by working multiple simultaneous odd jobs, the parents relocated the family to Antwerp, Belgium, when Marat was nine.

[7] In 2011, Grigorian fought for the inaugural It's Showtime 73MAX world title, losing a close unanimous decision to Yohan Lidon.

[15] Grigorian competed in the eight-man grand prix at the K-1 World GP 2015 -70kg Championship Tournament held in Tokyo, Japan on 4 July 2015.

[18] Grigorian returned to China for his next fight, as he was booked to face Steve Moxon at The Legend of Emei 9 on June 5, 2016.

[19] Grigorian's next bout likewise took place under the Legend of Emei promotional banner, as he faced Mohamed El-Mir at their tenth event on July 9, 2016.

[24] Grigorian faced Mohamed Mezouari in the quarterfinals at Kunlun Fight 67 - World MAX 2017 Final 8 on November 12, 2017.

Grigorian faced Dzianis Zuev in the penultimate bout of the tournament at Kunlun Fight 69 - World MAX 2017 on February 4, 2018.

[33] Grigorian made his second and final title defense against the undefeated Elvis Gashi at Glory 73: Shenzhen on December 7, 2019.

[38] Grigorian was scheduled to face Andy Souwer at ONE Championship: First Strike on October 15, 2021 in the quarterfinals of the ONE Featherweight Kickboxing World Grand Prix.

[40] Grigorian was expected to face Chingiz Allazov in the semifinals of the ONE Featherweight Kickboxing World Grand Prix at ONE Championship: Only the Brave on January 28, 2022.

[45] On September 21, Özcan was rescheduled to challenge the reigning ONE Kickboxing Featherweight champion Superbon Singha Mawynn, while Grigorian was booked to face Jamal Yusupov.

[46] As both Superbon and Yusupov failed the pre-fight medical, Grigorian and Özcan were once again schedule to face each other on September 29.

[48] Grigorian challenged Chingiz Allazov for the ONE Featherweight Kickboxing World Championship in a trilogy bout at ONE Fight Night 13 on August 4, 2023.

[53] Grigorian faced Superbon Singha Mawynn for the interim ONE Featherweight Kickboxing World Championship at ONE Friday Fights 58 on April 5, 2024.