Shah Rukh, 49, was asked by a fan on Twitter about his experience working with Varun and the superstar's view on the young actor's talent.
The 'Happy New Year' star replied, "He is very hardworking and extremely sweet."
Varun, 28, is reportedly playing Shah Rukh's younger brother in 'Dilwale' that also stars Kajol and Kriti Sanon.
The movie is set for a December 18 release in a box-office clash with Sanjay Leela Bhansali's period love saga 'Bajirao Mastani', starring Ranveer Singh, Deepika Padukone and Priyanka Chopra.


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