Check out their names:
Before the marriage bill passed in Ireland last year, he release a lovely video urging people to support the bill – and his gay brother Eamon.
“The fact that my brother had to leave Ireland to have his dream of being married become real is insane. INSANE!”
2. Anne Hathaway
'The Devil Wears Prada' star grew up as a Catholic – but when her brother told the family he was gay, they decided to leave their faith.
“The whole family converted to Episcopalianism after my elder brother came out,” she said.
3. David ArquetteDavid has repeatedly spoken of his love for his trans sister Alexis, “I grew up seeing how cruel people could be to someone trying to be true to themselves.”
4. Adam LevineLevine has repeatedly hit out at those who see sexuality as a choice, defending his gay brother Michael.
“I can single-handedly dispel any ideas that sexuality is acquired. Trust me: you’re born with it,” the frontman said in 2011.
“My brother is gay and we knew when he was 2. We all knew.”
5. Chris Evans
Captain America star Evans has spoken of his brother Scott’s “bravery” in coming out – and that his mother was disappointed that he wasn’t gay too!
“I was so glad that he did. That’s got to be a difficult transition, but I come from the most liberal household you have ever heard of.
“I think my mother was praying for [both of] us to be gay, so at least she got one of us.”
6. Chloe Grace Moretz
She was just 11 when she knew that her brother is gay.
"It is really hard to see my brothers be hated on or bullied, so I stood up for them,” the 'Kick-Ass' star said. “We shouldn’t be using these terms to create more labels and segregate us further apart than we already are.”
So what do you think? I'm not surprised myself, because that what all siblings should do: support each other.