London, March 2 (IANS): Actor Simon Pegg has undergone dramatic physical transformation for an upcoming movie role.

The star, 49, has been hitting the gym hard and has flaunted his lean figure, after shedding a large amount of body fat, through an Instagram post, reports dailymail.co.uk.

Pegg worked with personal trainer Nick Lower for six months to transform his body for the thriller "Inheritance", which required him to be quite slender. Lower shared the post.

"The brief for this role was lean, very lean. It required a specific body shape and look," Lower wrote alongside the photograph.

The trainer added that Simon did a combination of strength training with circuits and core work, along with 60 km trail runs per week.

He said: "Six months of hard work has paid off and I tip my hat to you sir."

The post was also shared on Pegg's Twitter account where he jokingly added that "occasional mild grumpiness" was another aspect of his training.

Pegg will play a character named Morgan in the film and will be starring alongside Lily Collins, Connie Nielson and Chace Crawford.