McConaughey unaffected by fame, says his mom

He's a cinestar, but fame hasn't affected actor Matthew McConaughey, says his mother Kay.

The actor's latest movie "Interstellar" is creating waves at the box office, but not much has changed about the man, who is as happy-go-lucky as he was before carving out a career in Hollywood, reports contactmusic.com.

"As long as I can remember, he's been happy. He's the same thoughtful, kind, happy person he always was. He's just Matthew," Kay said.

His father's death in 1992 had left Matthew devastated. But it made him a lot more mature.

Matthew recollected the experience in an interview, and said: "A boy loses his father, he quickly becomes a man. I was 22. I remember clearly the sobriety I felt in the pain of my father passing. The sorrow refined me, and I never looked at the world the same again.

"Everything I previously revered and looked up to suddenly dropped to eye level and felt more mortal and attainable, while everything I patronised and looked down upon rose up to a more respectful eye level and wasn't beneath me. The world was suddenly flat, and I looked it square in the eye with more courage and incentive than ever before."