Zac Efron's Birthday Wish Will Break Your Heart

On October 18, Zac Efron turned the big 2-8. We celebrated this auspicious occasion by taking an investigatory look at every time one of the actor's muscles appeared to be staring straight in our direction. (And, it was glorious.)

The b-day boy had his own message to share with the world this Sunday. The We Are Your Friends star posted a throwback pic on Instagram of himself and his cousin, Emily, on the beach when they were children.

The post is bittersweet, with a poignant caption that reads: "Happy birthday to my cousin and best friend, Emily, who passed away from cancer 2 years ago," he wrote, adding, "She was 28 like me."

"We share the same birthday and this day is forever ours," he continued. "My birthday wish is for you to donate anything you can to @su2c. The link is in my bio. Thank you everyone for all the birthday wishes. Love you."

Stand Up 2 Cancer is a nonprofit dedicated to raising money for cancer research. Efron has been affiliated with the organization since 2010, when he teamed up with Vanessa Hudgens, Dakota Fanning, and other stars in the PSA below. Read more about the organization here.

YouTube.

More from Pop Culture

Rob Kardashian and Blac Chyna have reportedly broken up — that is, if anonymous sources spilling secrets about the couple are to be believed. TMZ reports ...
Kim Kardashian is leveraging her massive Twitter following of over 48 million users for a good cause today. The reality star tweeted out a call to action ...
Once upon a time, Kiefer Sutherland and Julia Roberts were engaged. She was a starlet and he was Hollywood royalty: it was a match that any red carpet ...
Jeb Bush has been a Florida governor and a presidential candidate. His latest gig? Comedian, apparently. In an opening sketch for the Emmys, Jimmy ...
Young Hollywood is full of relationships new and old. Bella Thorne can vouch for that. The 18-year-old actress recently reignited a relationship with Teen ...
Taylor Swift may be 2015's highest-paid musician, but she's been bested in another fame metric. Selena Gomez now has more Instagram fans than the "Bad ...
Katy Perry has had a bit of trouble keeping her clothes on lately. And this time she's using her nudity for a good cause: encouraging people to vote. In a...
While Brad Pitt's ex Jennifer Aniston has stayed mum on the news of Brangelina's divorce, her husband Justin Theroux spoke up on Monday. He kept his ...
At this point, I am very familiar with heartbreak. No, not my own. I'm talking about Hollywood heartbreak. Couples come and go, but in the last several ...
On Good Morning Britain Tuesday morning, Piers Morgan made an, um, interesting comparison. While discussing a cute Gucci ad featuring Tom Hiddleston face-...
While she was in Milan for Fashion Week, Gigi Hadid elbowed a man who grabbed her on the street and lifted her in the air. Page Six called her attacker a "...
Rob Kardashian may have just taken sibling rivalry to a new level. The reality star's Twitter account posted Kylie Jenner's phone number late last night, ...
We've been learning all sorts of surprising things about actresses' former lives lately. Last week, we discovered that Emily Blunt was almost a pop star. ...
Jennifer Aniston has not yet said a word about the divorce of Brad Pitt and Angelina Jolie. But that doesn't mean the world won't try to find meaning in ...