United Kingdom, Feb. 15 -- Frankie Muniz has never thought of himself as a "great actor".

The 39-year-old star shot to fame when he took on the title role in 'Malcolm in the Middle' as a teenager but believes that his career is more down to "luck" than anything else.

He told E! News: "I don't know if I don't like to watch my stuff. I can separate me from watching. Does that make sense? I can watch it as like 'Oh I'm just watching the character, I'm just watching the show'.

"But I do find myself at times thinking 'Oh, I could have done that better'. I always have. I've never considered myself a great actor, I just feel like I got lucky."

The 'Renner' actor - who has three-year-old Mauz with fiancee Paige Price - only watched the long-r...