In 2008, Grantley shot to fame in the high rating drama, Underbelly, where he played antagonist and criminal Carl Williams.

[6] In 2017 Gyton took on his first TV presenting role as Host of Channel 10's Pooches at Play, a lifestyle show all about dogs and our relationship with them.

In 2018 he is performing in the theatrical production Hand to God and continues his hosting role on Pooches at Play.

He appeared as Ron Weasley in the Australian production, in Melbourne, of Harry Potter and the Cursed Child.

[8] Grantley is actively involved with the Australian organisation, Polished Man, which helps support and raise awareness for children affected by violence.