Zac Efron Thanks Fans For Birthday Greetings With A Shirtless Pic On The Beach

Zac Efron is looking good at 38!

The "High School Musical" star rang in his birthday on Monday, October 18. He received warm wishes from his fans and friends on his special day. To thank them, he shared a shirtless picture of himself posing on the beach on Instagram.

According to the actor, he celebrated the special occasion in Thailand, where he was filming a new movie.

"It’s my bday again? I’m gettin old now- thanks for the bday wishes everyone I love you. I am so lucky to be able to be on this amazingly fun ride with you all," Zac wrote in the caption. "This one feels very special as I get to spend it in Thailand, alongside the most talented and kind cast and crew, making a movie that I think will be awesome… couldn’t be a happier moment in my life. Love you all so much🙏😎💖."

The image showed him standing on the shallow part of the sea, clad in blue boardshorts. He was dripping wet from swimming and his chiseled abs were on full display. The actor flashed a big smile, while his dog took a dip behind him.

In less than a day, the post received over 3.2 million likes. Several stars from the entertainment industry and plenty of his fans reacted to Zac's post, leaving 34,000-plus comments.

"love ya bro 🤟🏼🤟🏼," his younger brother, Dylan Efron, commented.

"Happy birthday Bruddha!" host Darin Olien wrote.

"Happy day of birth champion!" artist Kode Abdo, aka BossLogic, added.

"Happy Birthday brotha. It's been a fun journey so far and stoked for more memories," actor Ryan Rottman noted.

According to Yahoo, Zac left Hollywood earlier this year, selling his Los Angeles home for $5.3 million. He moved to the land down under where he purchased a 318-acre plot of land in New South Wales -- the state between the famous Gold Coast and Byron Bay, where Chris Hemsworth lives.

As per the outlet, he has been working with Russell Crowe on a new movie, which was based on the New York Times bestselling book of the same name by John "Chickie" Donohue and J.T. Molloy.

"The Greatest Beer Run Ever," directed by Peter Farrelly, follows the story of Donohue, played by Zac, who leaves New York in 1967 to deliver beer to his childhood friends who are fighting in Vietnam.

Zac is also set to star in the upcoming remake of the 1987 film "Three Men and a Baby."

Zac has been known to flaunt his insanely toned body on social media, but he has made it clear that the figure he had for the 2017 "Baywatch" film was not "a healthy or normal way" to live.

"That's too big," he said at the time. "For guys, that's unrealistic. I'm telling you, I got very big and buff for that movie. But I don't want people to think that's the best way to be. Be your size… I don't want to glamorize this."

Last year, the actor shared that he only had five percent body fat while working on the movie — and wouldn't want to undergo the same experience again.

"Take care of your heart, take care of your brain, you're good," he said.