He first came to prominence in 2007 after starring in teen dramedy Grange Hill. In 2009, Laviscount had a recurring role on iconic British soap opera Coronation Street as Ben Richardson. In 2011, he competed in the rebooted series of Celebrity Big Brother, where he became involved in a love triangle with Amy Childs and Kerry Katona.

In 2010, Laviscount took part in a charity football match alongside Jack McMullen, Lyndon Ogbourne and other actors in aid of Sport Relief.

On 18 August 2011, Laviscount became a housemate in Channel 5's Celebrity Big Brother 2011. He lasted until the final week, finishing fifth. On the show, he flirted with fellow housemates Amy Childs and Kerry Katona. He found himself torn between the attentions of Katona and Childs which culminated in "Bedgate" where he ended up sharing a bed with the latter after a drunken party. He was dubbed 'Mumbles' by his fellow housemates.

Laviscount signed with SK Records in January 2012. His debut single, "Dance With You", featuring US Hip-Hop Artist MANN, was scheduled for an April 2012 release. It was a commercial failure after failing to chart.

It was announced on 22 February 2014 that Laviscount would be playing the lead role of Ennis Ross in Supernatural: Bloodlines, a spin-of to the US CW show Supernatural. He appeared in the backdoor pilot episode but the show did not get picked up. In 2015, Laviscount played a series regular role in Fox's US horror comedy series Scream Queens.