Rosario Dawson ghastly over-exposed steal the spotlight at star-studded premiere

Rosario Dawson may only have a supporting role in new thriller Eagle Eye, but she made sure she was the star of the show when she wore a revealing dress to the Los Angeles premiere last night.

Outdoing the film's leading lady Michelle Monaghan, who is six months pregnant with her first child, and Shia LaBeouf's stunning date Megan Fox, Rosario gave photographers an eyeful with her cleavage-exposing dress.

Not known for having a particularly large decolletage, it appears the Sin City actress may have been given a little extra help with a bust-boosting bra.

Green with envy: Rosario Dawson looks bustier than ever in her green gown at the premiere of Eagle Eye in Los Angeles last night

Rosario, 29, went for old Hollywood glamour in a emerald satin dress, flowing long curls and bright red lipstick.

But her overall look couldn't detract onlookers from her over-exposed chest, which harked back to the fake breasts worn by Paul Gascoigne after arriving back in Britain following the 1990 World Cup in Italy.

Never one to shy away from speaking her mind, Rosario attacked the recent celebrity status surrounding the U.S. presidential candidates John McCain and Barack Obama.

She said: 'I think that if there's anything positive to gleam about how this has become a celebrity fest with our politicians it is that people are paying attention.

'I really hope that that means that they're not more likely to buy more magazines than they are to show up for voting.

'We have to hold politicians accountable so we need to demand to hear policies, so I really hope the debates change from what has been going on in the media.'

Also at the premiere at Grauman's Chinese Theatre on Hollywood Boulevard was Michael Chiklis, Shia and Michelle.

Kicking her heels up: Rosario poses for the cameras on the red carpet

Shia is currently filming the Transformers sequel with Megan so brought her along as his date.

Eagle Eye tells the story of a slacker, played by Shia, and a single mother, played by Michelle, who find out they have been framed as terrorists and attempt to clear their names.

The film is set for release in the UK on October 18th.

A friend in need: Stunning Megan Fox lends her Transformers co-star Shia LaBeouf some support at his premiere

Shining moment: Rosario joins her co-stars (L-R) Michael Chiklis, Michelle Monaghan and Shia LaBeouf at the screening