Directed by Ashu Trikha, "Enemmy" is a cop action drama, which features Mithun and actor Suneil Shetty in lead roles, while Mahaakshay plays a CID officer in the film.
"For me, it was a nerve-wrAcking experience," Mahaakshay said here Friday at the music launch of the film.
Actor Akshay Kumar was present as the chief guest of the event, where film's other cast members were in attendance too.
Mithoon said he was happy to work with his son.
"He is growing as an actor, and I want him to grow...that's the way," Mithun said here.
Mahaakshay made his acting debut as Mimoh with the film "Jimmy" in 2008 and later he was seen in the films like "Haunted 3D" and "Loot". But he couldn't get a strong foothold in the industry.
Mithun wants his son to carve his own niche.
"You have to fight your own battle. I am not one of those fathers who always goes on blessing and praising, that 'yes, everything is good'," he added.
Slated to release June 21, "Enemmy" also features Kay Kay Menon, Mahesh Manjrekar and Yuvika Chaudhary of "Om Shanti Om" fame.