"The Devil Wears Prada" actress reportedly grew up wanting to become a nun, but she says she shunned Catholicism when she learned her older brother, Michael, was gay.
"The whole family converted to Episcopalianism after my elder brother came out," she told British GQ. "Why should I support an organization that has a limited view of my beloved brother?"
Accepting an award from the Human Rights Campaign in 2008, Hathaway once again spoke of her experience with a gay brother. "In my household, being gay was, and is, no big deal," she said. "When my brother came out, we hugged him, said we loved him, and that was that."
The hunky Maroon 5 singer spoke at length about his gay brother Michael in an interview with Out magazine. "I can single-handedly dispel any ideas that sexuality is acquired," he said. "Trust me, you're born with it. My brother is gay, and we knew when he was two. We all knew."
Levine told the magazine that he and his family opted to provide a strong support network: "We all really wanted to provide some cushion for him and constantly let him know that it's OK. A lot of people don't want their kid to be gay and will fight it at all costs...you've just gotta embrace it from the beginning. That's the only way to deal with it as a family. Otherwise, you're just screwing yourself over, and you're gonna make your kid miserable."
The "In Bruges" star is often perceived as a macho Hollywood playboy, but he's always been a fierce advocate for his gay brother, Eamon Farrell.
"I can't remember much about the years of physical and emotional abuse my brother Eamon suffered," he has said. "My brother was so forceful in standing up for who he was, and for the good that he knew was inside of him. Many people missed out on an opportunity, not only to enjoy him, but to enjoy themselves by embracing his 'difference.'
As The Advocate is reporting, the Farrell brothers have joined forces with Stand Up! Don't Stand for Homophobic Bullying, a campaign launched last week by the Irish LGBT youth organization, BeLonG To.
The "Captain America" heartthrob has spoken highly of his openly gay brother Scott Evans, who is also an actor.
"Yes, I do have a gay brother," he told The Advocate in 2009. "I'm down with the gays. Mostly I'm hanging out with him and his gay buddies, who are fucking hilarious. They're the funniest people I know. They've invited me out to gay bars before, and I said, 'Look, guys, I've got to draw the line there.' That's where a photo will get taken, it will run in magazines, and before you know it, I'll be living down the gay rumor for the rest of my life.
"[My brother looks like me], but he's about an inch taller and about four shades tanner than I am. He's a very fit young man. Believe me, he does quite well for himself."
Although Madonna and her gay younger brother were once inseparable (she was described them as "the closest members of the family" in an interview with The Advocate), the two eventually fell out over finances and the Material Girl's then-husband Guy Ritchie, whom Ciccone described as being homophobic.
It presumably didn't help matters when Ciccone (seen here in 1991) cast his sister in a less-than-favorable light throughout his tell-all memoir, "Life With My Sister Madonna."
Despite their fractured relationship, Ciccone has said, "I love her. It will take some time for us to find our way back to, to a good place, and I'm not sure when and if that will happen. I hope it does."
They both broke their share of teenage girls' hearts in the late '80s and early '90s as members of New Kids on the Block (NKOTB), but in 2011, Jonathan (right) revealed he was gay -- well, after being somewhat outed by fellow popstar Tiffany.
I have never been outed by anyone but myself! I did so almost twenty years ago. I never knew that I would have to do it all over again publicly just because I reunited with NKOTB! I have lived my life very openly and have never hidden the fact that I am gay! Apparently the pre requisite to being a gay public figure is to appear on the cover of a magazine with the caption 'I am gay.'
I apologize for not doing so if this is what was expected! My belief is that you live your life by example, and not by a caption on a magazine! If there ever has been any confusion about my sexuality, then you are someone that doesn't even know me!
I love living my life being open and honest, but at this time I choose not to discuss my private life any further! My fellow band members don't discuss their private lives with their loved ones and I don't feel that just because I am gay, I should have to discuss mine!"
The "True Blood" hunk, who has been fiercely private about his own love life, spoke to The Advocate in 2010 about his gay brother Lloyd, who is a doctor.
"He was probably about 18 when he came out, and I can wholeheartedly tell you that from the day that he did, he was a changed man for the better," Kwanten said. "The sheer beauty of who he is really came through...There was never an issue [with my family]. My parents always encouraged an open channel of communication, so we talked about that and everything else. That's something lacking in a lot of modern-day families -- just talking. It's almost a lost art form."
As After Elton notes, Zeta-Jones' gay brother David is an executive at the Initial Entertainment Group, which has produced a number of Martin Scorsese films.
The siblings have reportedly co-produced an thus-far-unreleased film, "Coming Out," about a gay cabaret singer who is suddenly expected to lead a rugby team to victory, starring Alan Cumming and Zeta-Jones.
An open lesbian herself, the talk show queen was among 400 guests this January when her brother, New York Assemblyman Daniel O'Donnell, finally wed longtime partner John Banta.
The country star, whose sister Betsy Smittle is a lesbian, made an indirect reference to gay rights in his song "We Shall Be Free."
"When we're free to love anyone we choose / When this world's big enough for all different views/ When we're all free to worship from our own kind of pew / Then we shall be free," read the lyrics.
Smittle, a bass guitar player who has toured with Brooks, was reportedly the headline performer at Oklahoma City's gay pride in 2006.
The pop diva is more than just a gay icon and LGBT rights advocate; her own sister Ellen is a lesbian.
Of her motivation for LGBT charity work, Lauper has said, "I reached out to the community a while ago when I did "True Colors" and I got a lot of letters that were very moving. Lots of teenagers who had just come out and were depressed about their parents disowning them. Some were suicidal, some were just sad."
She went on to note, "And it was a lot for me, because my sister is a lesbian -- and she's one of the most fantastic people I know. It's a family issue. If you can't vouch for people in your own family, who are you going to vouch for?"
The "Pretty Woman" star has been a vocal supporter of marriage equality, citing his gay younger brother David as inspiration.
"My brother is gay and he got married in that brief period when gay marriage was allowed in California," Gere is quoted as having said in 2009. "He has two great kids and is a wonderful father."
The transgender sister of actors Patricia, David and Rosanna Arquette, Alexis documented aspects of her transition for "Alexis Arquette: She's My Brother," released in 2007.
"They don't want to offend; they don't want to mess up and call me 'he,'" she has said of her siblings. "My family saw the [film] and if anything they're more concerned about my safety and having my feelings hurt."
David, who co-starred with Chaz Bono on "Dancing With The Stars," has come out in support of Alexis, noting to Access Hollywood, "I grew up seeing how cruel people could be to someone trying to be true to themselves."
The "Charmed" star, who is also an LGBT rights advocate, confirmed to HuffPost Gay Voices via her publicist that one of her siblings is gay.
Gingrich is known for a conservative stance on LGBT rights, which his half-sister Candace Gingrich-Jones has been nonetheless vocal about.
When Newt called gay marriage a "temporary aberration," Gingrich-Jones replied, "I don't think I consider my own marriage an aberration, or that anyone who is in a relationship considers their families to be an aberration. It might be wishful thinking on his part. Certainly he's seen how the country has moved on the issue. Maybe what really is an aberration is people's opposition to marriage equality."
She told HuffPost Gay Voices Editor-At-Large Michelangelo Signorile in January, "I don't think I I would able to live with myself if I wasn't very publicly pointing out the flaws in my brother's campaign, particularly when it comes to LGBT issues."
Barr's real-life brother and sister are both gay, which is what inspired her to push for introducing gay characters and issues into her hit TV show.
"I really encourage parents to stop destroying their children by doing that," she has said. "It is not good family values. Being gay is not a choice. I didn't choose to be straight anymore than my siblings chose to be gay."
Of his gay brother Chris, the actor has said, "We lived in Iowa and then I moved out to Los Angeles and kept talking to him, I said, 'Chris just tell me. It's cool because I have a lot of gay friends.' He wouldn't come out with it, and then one time he came to a set with a guy and they had shorts on and the guy put his hand on my brother's leg and he didn't take it off.
"I remember my heart sank even though I said, 'I'm hip, and I'm cool.' It sank because I was scared that immediately people were going to be mean to him back in our small town and his life was going to be harder."
"The L Word" actress said growing up with a gay brother helped prepare her for her role as a deaf lesbian on the series.
"Nothing surprised me about the issues in the script," she is quoted as telling Curve magazine. "I know how it feels to be thought of as 'different' as a deaf person, and I also know my brother's experience. No one should tell us who we should be with or shouldn't be with."