Why is Deepika Padukone sticking her tongue out?

Ranbir Kapoor, Deepika Padukone and director Imtiaz Ali were spotted at Mumbai Central station last afternoon.

The trio boarded a train to New Delhi as part of promotions for their film 'Tamasha'. Deepika appeared as excited as a child to board a train and playfully stuck her tongue out.

They were later spotted sipping coconut water while seated on their berths.