The former 'Lost' star and his wife, Yessica Kumala, are expecting a brother or sister for their four-year-old daughter, Java.
Asked about being considered a sex symbol, he told TV show 'Entertainment Tonight': "That's funny because I'm a family man. I've got a four-and-a-half-year-old daughter and another one on the way - pretty excited about that."
The 44-year-old actor - who married Yessica in October 2004 - has previously told how becoming a dad changed his focus in life.
He said: "I don't care how everything else goes now as long as I'm a good father."
Josh also spoke of how he wanted to be a "hero" to his little girl.
He said: "[Fatherhood has] made me hungry, and so joyous about life in general. I feel a responsibility to be a better human being. To be her hero. I mean, I gotta be. I will be."
The actor is a hands-on dad and even loved changing his daughter's diapers.
He said: "I change her all the time. I'm super fast. I bathe her, I do everything."