The two stunning stars stepped out for the movie's LA photo call in spring's muted colours, with Scarlett choosing an ultra-chic Roland Mouret dress and Louboutin heels.
The actress also worked sexy voluminous blonde locks - a look we think is one of her best hairstyles to date.
Co-star Gwyneth also looked super-hot in a Victoria Beckham Collection curve-clinging grey shift with statement nude and black heels.
Both stars joined Robert Downey Jr, Jon Favreau and Don Cheadle at the Four Seasons Hotel in LA for the photo call for Iron Man 2, which is set for release on 30 April.
Can't wait to see what they pull out for the premieres!
By Ruth Doherty