Look who is praising Varun Dhawan!

Superstar Shah Rukh Khan is all praise for his "hardworking" Dilwale co-star Varun Dhawan.

The two will be seen sharing screen space in Chennai Express helmer Rohit Shetty's upcoming comedy-drama.

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. https://t.co/2byXiZiZaS

— Shah Rukh Khan (@iamsrk) October 1, 2015

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.

Read: Shah Rukh Khan overwhelmed after 'Fan' team watches the film