Nick Jonas will to do whatever...

The 22-year-old actor's character Nate Kulina drunkenly had a gay fling in the season finale and now Nick has insisted he is committed to whatever the outcome of the story is, even though he is unsure what will happen as the fighter struggles with his sexuality.

Speaking about his character, he said: "He's still trying to figure it out, and it'll be a journey for sure.

"I'm willing to go wherever I need to go with the story and we'll figure it out when we get there, I guess."

The 'Jealous' hitmaker proved how devoted he was to the role when he piled on 15 pounds of muscle for the dysfunctional family drama, increasing his daily caloric intake from 3,000 to 4,200 each day, as well as spending many hours in the gym.

However, the former Jonas Brothers star admitted the real challenge came when he was made to slim down for his intimate scenes when producers wanted to show off his chiselled body.

Speaking about how he shed the pounds so swiftly, he told ETonline: "Basically it just consists of drinking a lot of water, cutting out sodium.

"And it's just a lot of sweat. A lot of sweat."