Meet Ranbir's Rockstar babe

Nope, it's not a star kid launch, and it's not going to be an established actor.

Director (Jab We Met, Love Aaj Kal) Imtiaz Ali's new film Rockstar stars Ranbir Kapoor and supermodel Diana Penty. 

A few things you might not have known about the 25-year-old stunner:

She recently replaced actor Deepika Padukone as the face of Maybelline in India.

Imtiaz had cast Deepika as the heroine in his last film, Love Aaj Kal.

A Mumbai girl, Diana (born November 2, 1985) signed for Elite Model Management in 2005, when she was 20.

She appeared with her Rockstar co-star Ranbir in a recent ad for Vodafone.

Diana's dress size is 4. A tall girl measuring an impressive 5'9.5", she has gone on record saying that size zero is a children's size and that women should have a more healthy body image.

The brown-eyed, brown-haired beauty has graced quite a few Indian magazine covers Cosmopolitan, Verve, L'Officiel and Elle.