KJo - kabhi director, kabhi teacher!

Karan Johar is occupied with his next directorial "Student Of The Year", which is the launchpad for three new actors, and says it is joyful to work with newcomers.

"The joy of directing newcomers! Their acting innocence can never be replaced...am enjoying playing part director part teacher," Johar posted on Twitter.

"Student Of The Year" will see Siddharth Malhotra, Varun Dhawan and Alia Bhatt, making their Bollywood debut.

While Siddharth is a model-turned-actor, Varun is director David Dhawan's son, and Alia is filmmaker Mahesh Bhatt's daughter.

The movie is a co-production by Johar's Dharma Productions and Shah Rukh Khan's Red Chillies Entertainment.