Sophia Bush
The actress (pictured with former reality-TV star Shanna Moakler) wears American Apparel's Legalize Gay tee while out at a gay marriage rally following the California Supreme Court's ruling to uphold Proposition 8 in 2009 (their efforts didn't go unnoticed—the proposition was dismissed four years later).
Drew Barrymore
At the same West Hollywood rally as Sophia Bush, Barrymore shows support in a rainbow-printed tee, electric blue eyeliner and sticker-studded jacket.
Russell Brand
The British comedian and TV personality leaves a Los Angeles yoga class wearing the male-fitted version of the Legalize Gay T-shirt.
Kristen Bell
The Veronica Mars actress attends the launch of Friendfactor at Lavo in New York City, sporting a rainbow-emblazoned V-neck tee (part of Old Navy's It Gets Better collection), fitted blazer, pencil skirt and strappy sandals.
Simon van Kempen & Alex McCord
The former Real Housewives of New York City stars (and real-life married couple), rally to support gay rights at the 2011 NYC LGBT Pride March in bright orange I Do Support Marriage Equality tees.
Leighton Meester
The actress—in a colorful suspenders-and-shorts ensemble—shows support for the Long Beach Gay Pride Parade while filming scenes for the upcoming film Life Partners.
Ian McKellen
The X-Men star wears a crimson Some People Are Gay, Get Over It T-shirt while addressing a crowd at a gay rights rally in Melbourne, Australia.
Lourdes Leon
Madonna's daughter puts a casual spin on her Legalize Gay tank, wearing mint green cutoffs, a baggy hoodie and bright sneakers while out in New York City.
Rose McGowan
The actress leaves a Studio City gym and lets her T-shirt do the talking, rocking a Some Dudes Marry Dudes, Get Over It top with sweatpants and sneakers.