Harrison Cosmo Krikoryan Jarvis, known as Cosmo Jarvis, was born on September 1, 1989, in Ridgewood, New Jersey, USA. He is a British actor, musician, and filmmaker. He moved to England with his parents when he was just a baby and grew up in Totnes, Devon, with his mother and younger brother.

His mother is of Armenian-American descent, and his father is British. Cosmo has always felt more connected to England, where he spent most of his life. He began his career in the entertainment industry as a singer-songwriter, releasing his first album in 2009.

His single "Gay Pirates" from his second album gained significant attention and was voted number 85 on the Triple J Hottest 100 of 2011. Cosmo Jarvis also ventured into filmmaking, directing and starring in his first feature film, "The Naughty Room," which premiered on BBC Four in 2012.

His acting career took off when he was cast as Sebastian in the 2016 film "Lady Macbeth." His performance earned him a nomination for Most Promising Newcomer at the British Independent Film Awards.

He continued to gain recognition for his roles in films such as "Calm with Horses" in 2019, for which he received a nomination for Best Actor at the British Independent Film Awards, and "Persuasion" in 2022. In 2024, he portrayed John Blackthorne in the historical drama series "Shōgun." Cosmo has also appeared in stage plays, including "The Hairy Ape" and "The Twilight Zone."

In his personal life, Cosmo Jarvis is known to be very private. There are rumors that he has a long-term partner named Emily, but these have not been confirmed.

He does not have a public social media presence, which adds to the mystery surrounding his personal life. Despite his success, he has managed to keep a low profile and focuses on his craft.