Mumbai, Aug 25 - Ajay Devgan as a rock star strumming away the heated strings on stage is a hard act to swallow. Not for Vipul Shah who has modelled the Bollywood star's act on the Irish singer Bono in his forthcoming movie 'London Dreams'.

'So far we've only seen him in a sedate or comic image, never as someone who can cross the frontiers and do something outrageous,' Shah, who hasn't quite converted the actor in an outrageously punky rock star, told IANS.

'No, not quite the reckless renegade. I've modelled Ajay's rock act on Bono, the Irish lead singer from U2. Bono was never your quintessential rock star. He had a more sober and a less wild image. When Ajay gets on stage in 'London Dreams', he replicates the curbed tempered-down rock-star's image of U2.