Robert Montgomery is an internally renowned artist. He became well-known after his light art work "The People You Love Become Ghosts Inside of You and Like This You Keep Them Alive" was shared more than 15 million times on the internet, making him one of the most popular artists of the internet age.

He represented Great Britain at the 2012 Kochi Biennale and the 2016 Yinchuan Biennale. Along with the architects Allied Works he was a shortlisted finalist for the UK National Holocaust Memorial in 2017 with the design scheme exhibited at the V&A Museum in London. He has had solo museum exhibitions at Cer Modern in Ankara, and at the Aspen Art Museum in Colorado and his work is in the permanent collections of The Museum of Fine Arts Houston and the Albright Knox Museum in New York.

His sell out exhibition at JD Malat Gallery during Frieze London in October 2019 introduced the new medium of painting to his established mediums of light works and text works.

The writer Dane Weatherman said of his work, “To encounter the work of Robert Montgomery is to make a tender encounter whose tenderness is enhanced by the public, communal quality of his work. To encounter his work is to have your body filled with a sad thunder and your head filled with a sad light. He is a complete artist and works in language, light, paper, space. He engages completely with the urban world with a translucent poetry. His work arrives at us through a kind of lucid social violence. No one has blended language, form and light in such a direct way. "

Well-known collectors and champions of his work include the musicians Michael Stipe and Florence Welch.

Montgomery has been a visiting professor at The Slade School of Art, the University of Newcastle and Chelsea College of Art. He is also a film producer and occasional actor. His film "Hurt By Paradise" (2019) made with Greta Bellamacina was nominated for The Michael Powell Award for Best British Film at the Edinburgh Film Festival and Best UK Feature Film at Raindance. It is scheduled for cinema release in spring 2020.

Dior Homme and Valentino have commissioned major artworks by Montgomery for their stores and he has been the face of brand campaigns for Pringle of Scotland, John Smedley and Persol.