Ellen Page publicly dated Ben Foster, a costar from the XMen movies. However, in February 2014, she came out as gay.
A quote:
"I'm here today because I am gay. And because... maybe I can make a difference. I am tired of hiding and I am tired of lying by omission. I suffered for years, because I was scared to be out."
Dakota Fanning has not publicly stated her sexual orientation.
Logan Lerman has never publicly discussed his sexual orientation.
Kiefer Sutherland has never publicly talked about his sexual orientation, but he has been married twice to women.
He is straight.
Trisexual
Ellen did not "go" lesbian. People are born with their sexual orientation pretty well in place.
She is proved to be a lesbian, after admitting it on the Ellen Degeneres show.
The character of Flapjack is not written with sexual orientation
Nothing is known of her sexual orientation.
Soko's sexual orientation is heterosexual/straight.
The Joker's sexual orientation is not written into his character.
The fictional character of Yoshi is not depicted with sexual orientation.
The SNL character "Gilly" was not written with sexual orientation.
Matt Evers' sexual orientation is not known.
The sexual orientation of David Rodriguez is unknown.
Frankie Muniz has not stated his sexual orientation.
I think you mistake "sexual orientation" with specific types of orientation. Sexual orientation is a part of every humans make up. A person can not have a sexual orientation. Your sexual orientation is what makes you gay, straight or bisexual. Homosexuality IS illegal in some countries. You can outlaw a behavior but you can't outlaw an urge or feeling.