(Photo by Gregg De Guire/Wire Image) TOKYO - JANUARY 28: Actor Zac Efron (L) waves to the audience with actress Vanessa Hudgens during the 'High School Musical 3: Senior Year' Japan Premiere at Shinagawa Stellar Ball on January 28, 2009 in Tokyo, Japan.
‘So grateful I came across this picture,’ he wrote alongside the image. crew during one of the most cherished and exciting times of my life. #fbf.’ The cute pic was taken back in 2008 around the time High School Musical 3: Senior Year, the third and final installment from the series and the only one released in cinemas, came out.
Zac, who stars in the movie Bad Neighbours 2, seems to have been distancing himself from HSM recently, so his post is particularly significant.
He was conspicuously absent from a Disney Channel TV cast reunion to celebrate the 10th anniversary of the release of the first movie back in January – although he did record a special message.
However his former co-stars Vanessa, Ashley, Corbin Bleu, Monique Coleman and Lucas Grabeel were seen reuniting at East High and walking through the gym where they shot HSM classic track We’re All In This Together.
Co-stars Ashley Tisdale and Zac Efron have always been good friends, though.
But Tisdale isn't the only “HSM” star that wished Zac a happy birthday.
EXCLUSIVE: Zac Efron and Adam De Vine Talk Butt Doubles and Who Has the Softest Lips"Dating is something I'll never be able to do," he tells .
"As in the dictionary definition of dating, because one way or another I've impacted that person's life and they'll soon realize it.
Dressed in a gorgeous ballgown-style wedding dress with a floral hair crown, Tisdale shared a snap of her and her new husband Christopher French, captioned "Best day of my life!