‘Treme’ star Michiel Huisman joins Joseph Gatt for ‘Games of Thrones’ season 4 as Styr

Michiel Huisman will join the fourth season of HBO’s fantasy drama based on George R.R. Martin’s best-sellers.

The actor, who most recently recurred on ABC’s Nashville as a love interest for Rayna (Connie Britton), joins Thrones’ growing season four cast that includes Joseph Gatt — whose role also is being kept under wraps.

While the exact role is not 100%, even IMDB is listing Huisman as Styr, Magnar of Thenn, the wildling leader known for his muscular build and hairless body.

In A Storm of Swords, the third book in Thrones author George R.R. Martin‘s A Song of Ice and Fire, Styr leads an attack on Castle Black as part of Mance Rayder’s assault on the wall.

Martin has said Styr will have a role in season four, as well as other new characters Mace Tyrell (father of Margaery and Loras) and Oberyn Martell (better known as The Red Viper – a man with a vendetta against the Lannisters).

Huisman played Sonny on Treme, the HBO show which began in 2010.

Also new to Thrones is Roger Ashton-Griffiths taking on Mace Tyrell and The Red Viper going to Graceland actor Pedro Pascal. Rome‘s Indira Varma, who will play The Red Viper’s love interest Ellaria Sand; and Sherlock‘s Mark Gatiss, whose role is also being kept under wraps.

Games of Thrones is expected to return spring of 2014.