Grey was born in London but grew up in Spain and later trained at the Boris Shchukin Theatre Institute in Moscow.

[3] Grey trained at the Boris Shchukin Theatre Institute in Moscow, which resulted in him also learning Russian.

[2] Alongside acting, Grey also sold "fish" dog food, which he called "just such a funny thing" that he was embarrassed by.

[5] This job allowed Grey to work on the weekends whilst auditioning through the week, which he called a "lovely" experience that he became grateful for.

[5][8][3] On 11 January 2022, it was announced that Grey had been cast on the ITV soap opera Emmerdale as newcomer Marcus Dean, the son of former character Pierce Harris (Jonathan Wrather).

[9][10] Grey revealed that he was "quietly smiling inside" when his agent sent him the role of Marcus, explaining, "We share so many similarities, both the good – and perhaps – some of the bad!

[4] Emmerdale producer Kate Brooks was "delighted" to welcome Grey to the cast and believed that Marcus would make "quite the impression" on viewers.

[22] Grey did not release an official statement but reposted the reports of his departure alongside three heart emojis, and he later thanked fans on Twitter for their support and expressed excitement for his future roles.

[23][24] Grey's final episode as Marcus aired on 21 February 2023, which featured the character's departure following his breakup with Ethan.