Siddharth Roy Kapur is all smiles at a book launch event

Vidya Balan's husband-to-be Siddharth Roy Kapoor at a book event over the weekend

He was all ears at a discussion with Andre Miller about his novel Snowdrops. For most part he was fiddling with his cell phone and smiling ear-to-ear. Could it be because of the remake rights that his production house has secured?

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