Hugh Jackman keeps splitting his pants due to his training to become Wolverine for Deadpool 3

Hugh Jackman is having a few serious wardrobe malfunctions as he prepares to step back into the role of Wolverine.

Fans were elated last month when Jackman and Ryan Reynolds confirmed that he would return as the Adamantium-clawed action hero in Deadpool 3.

Marvel fans thought Jackman's 17-year-run as the X-Men hero was over, but apparently that was not to be the case.

The Wolverine star is already training to get in shape for the third film, and, from all reports, it seems to be going better than expected.

Jackman told Variety that his muscles are already getting too big for his clothes, although he is losing about 1,500 calories a night on the Broadway stage for The Music Man.

Jackman's bulking up has been going so well that he felt the need to apologise to all involved in the Broadway show.

20th Century Fox.

"Apologies to the entire cast of The Music Man, and in particular my dresser and my wife. All the protein shakes are starting to kick in fast," Jackman told Variety.

"The other night, I could hear the Velcro go creaking and actually popped open. I've split two pairs of pants."

He went on to explain the massive tear and how it happened at the worst possible moment.

"It was an 18-inch tear. I had about two minutes [before I had to be on stage]. I said to the stage manager, 'New pair of pants!' I had my pants around my ankles. I thought, if my dresser doesn't get here in time, it's better to go on in split pants than no pants.

"Then I saw him running from stage right to stage left, top speed."

He added: "We made it just in time."

In early October, Jackman took to Instagram to share that he was back in the gym and hitting the weights hard.

In the sweaty snap, which was posted to his stories, the 53-year-old can be seen wearing a very damp grey t-shirt while flexing his muscles.

He captioned the pic: "Work in progress."

Hugh Jackman/Instagram.

If you want to get an insight into the kind of gruelling regime Jackman puts himself through when preparing to play Logan, personal trainer Mike Ryan is about as good a person as any.

He got Jackman into shape back in 2009 when he was preparing to shoot X-Men Origins: Wolverine.

Speaking about his progress, Ryan said: "It’s all about evolution.

"From one workout to the next I’ll always have something new to add to the equation. Our sessions are based on established principles, but we’ll always try and bring new ideas to the table."

He added that it usually begins quite early: "When Hugh has a 6am filming start, that means we’ll be in the gym by 4am."