Actor Matthew McConaughey, who has been associated with romantic-comedies for long, says he decided to play AIDS patient in `Dallas Buyers Club` because he wanted to "shake up" his relationship with his "career".

He has received his first Oscar nomination for `Dallas Buyers Club`.

"I see it as much more of a natural transition... I wanted to do some things different. I look back and go, does that have to do with me being in my forties? Sure. Does that have to do with me starting a family? Sure,` McConaughey said in a statement.

`I wanted to shake up the relationship that I have with my career, although I was enjoying my career, I enjoyed the work I did then. I may do another romantic comedy in the future. It's just using different muscles,` added the actor.