Despite having dated model Stacy Keibler since July 2011, George Clooney won't be marrying her, says his big sister Adelia Zeidler.

When asked about whether or not she thinks the famous bachelor would ever tie the knot with anyone, Adelia - who goes by Ada - claimed that Clooney chose to put his career over family: "I think he decided that in his life he could have the career or he could have a family and so when he decided to go full bore into the acting, that was where his focus was going to be."

Ada also spoke about how Clooney's dating pattern hasn't seemed to change since his high school days. "Well he had several girlfriends when he was going to high school down here. Never more than one at a time, he’s not that kind of guy. But he would go out with someone for a few months and then go out with someone else for a few months... I think he was always pretty fair and honest with the girls he went out with. I don’t recall any of them feeling as though he had just broken their heart and dumped them unexpectedly, I think most of the relationships came to a kind of natural close. I don’t recall any angry phone calls or anything like that."

She was also quick to laugh off the constant rumors about her little brother being gay. "Yes that’s quite ridiculous, we don’t even listen when people say things like that anymore," she said.

Ada lives in Augusta, Kentucky - where both she and George grew up - down the street from their parents, Nina and Nick.