Alexander Skarsgard refuses to reveal all in interviews on the advice of his famous father STELLAN, who urged him to "protect" his private life.
The 33 year old began his career as a child star in his native Sweden and landed a steady stream of roles before he was thrust into the spotlight in 2008 with a regular slot in hit U.S. show True Blood.
Skarsgard, who is rumoured to be dating Kate Bosworth, remains guarded about his personal life during interviews - a tip he received from his Mamma Mia! star father.
He tells Rolling Stone magazine, "I don't want people to know too much about me. It's easier for people to suspend disbelief that way. There's a risk when people see you in a part and they're watching Alexander Skarsgard.
"Also, I learned from my father to keep your integrity and protect your family - there are certain things that you can talk about and certain things you shouldn't talk about."