The actor reprises his role as Logan/Wolverine for the fifth time in the sequel to 2009's X-Men Origins: Wolverine, which is being directed by James Mangold.
Jackman shared his excitement about the first day of filming via a Twitter post yesterday.
"We're on day 1 of shooting," Jackman wrote. "Wolverine is back…feel so pumped about this one……never felt so ready!!!! will keep y'all posted!!!"
He later shared a photograph of one of the high-protein meals he is eating to stay in shape for the part.
"And you know what that means.... the wolverine diet!! this was meal 2 at 9am this morning," he wrote alongside the photograph of chicken breast and asparagus.
Jackman recently spoke about his excitement at returning to the role, describing Wolverine as the backbone of his career.
Shooting on The Wolverine began yesterday in Sydney, Australia, with the key role of Viper still yet to be filled following Jessica Biel's departure.
The Wolverine will be released on July 26, 2013. Watch Jackman discuss the film with Digital Spy below: