Zac Efron looks unrecognisable on set with Phoebe Dyvenor as they hold hands for new film

High School Musical star Zac Efron and Bridgerton actress Phoebe Dynevor are working together on a new movie, 'Famous', and were seen filming some scenes in California last night

Zac Efron looked stern as he was pictured with Phoebe Dynevor while filming some scenes for their new movie.

The 37-year-old actor, who rose to fame in the early 2000s for his leading role as Troy Bolton in High School Musical, was seen wearing a brown suit paired with a black shirt and sunglasses. Phoebe, best known for her role as Daphne in Bridgerton, was seen in a long green dress paired with a small black bag and black heels.

The pair were filming some night scenes at the Alex Theatre in Glendale, California, for their upcoming A24 movie "Famous" which is based on the acclaimed novel by New York Times bestselling author Blake Crouch. The film follows the story of Lance Dunkquist, a man who is the splitting image of Hollywood icon James Jansen.

The story sees him travel to Los Angeles to make his dream come true - and he wants to become famous, no matter what it takes. In the upcoming thriller, Zac plays both Lance and James. The novel has been adapted for the screen by Chad Hodge, who previously worked with the book's author to translate his "Wayward Pines" book series for TV.

In photos taken last night, Zac and Phoebe can be seen in the streets of Glendale alongside staff members working on the film. In one image, Zac gives Phoebe his hand while she gets out of a car, while another image shows them looking on as they film the scenes.

Earlier this month, Zac was seen filming another scene for the movie alongside co-star Ernie Hudson. He sported a 50s-inspired grey suit paired with a white dress shirt and a brown, patterned tie. He also wore black shoes and carried a black briefcase in his hand.

The official IMDB synopsis of the movie reads: "Lance Dunkquist has the face of a movie star. Not just any movie star - Lance has been mistaken for Hollywood star James Jansen 228 times. And now Lance is about to go to LA to make his dream come true. No matter what it takes."

It comes after Zac starred in The Iron Claw as wrestler Kevin Von Erich. In the film, the actor bulked up significantly for the part, resulting in back issues that months of physical training couldn't easily resolve. In search of a solution, Zac turned to stem cell therapy. He reached out to Dr Adeel Khan at the Canada-based clinic, Eterna Health, who was able to answer all his questions and make him feel "confident" about moving forward with the treatment.

In September, having stepped away from his intense training regime and undergone the unique therapy, the High School Musical star said he was feeling better and was able to hit the gym again without much issue. Sharing an update on Instagram, Zac wrote: "Excited to explore the latest longevity technologies through the Eterna Membership Program - I'll keep you updated on my progress!"

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