Sam Rockwell is known for his leading roles in critically acclaimed movies like "Moon," "Lawn Dogs," and "Matchstick Men" as well as for his supporting roles in "Iron Man 2," "Cowboys & Aliens," and "The Way, Way Back."

Rockwell has been praised by the critics for playing unconventional roles with ease and originality. He has a knack to turn any out-of-the-box character into a relevant and more practical one while maintaining the uniqueness of it.

As the actor celebrates his 47th birthday today, here are some of his most popular quotes that prove he is not only an actor by heart, but also a true artist.

"I try to steal from the best. Suck it all in. 'Taxi Driver' is really a bible for film actors, a master class. A lot of emotional power, a lot of emotional depth but it's contained and you just see the tip of the iceberg."

"I have memories of films that nobody ever saw, that I was very proud of, and those are still great memories."

"I've studied a technique called the Sanford Miesner technique that teaches you how to focus. It's mainly about daydreaming. And the technique's really about imaginary circumstances. Using your imagination to sort of daydream about stuff. It makes you emotional in a scene."

"Good acting is good acting, however you learn it. Some people who haven't studied are amazing. Some people like Leonardo DiCaprio are naturally gifted - he's learned technique by working with people early on."

"I always do drama. It's just that some people laugh at it and some people cry."

"You hit 41 and you don't burn calories like you used to."

"Hollywood constantly wants to label you and type you into a certain category, 'Oh he's a comedy guy,' or the weirdo character guy or the villain."