SBullock060608_03_X17.jpgSandra Bullock SBullock060608_38_X17.jpg Ryan Reynolds may be engaged to Scarlett Johansson - but that's not going to stop Sandra Bullock from popping the question too!

We caught Sandra demurely taking a knee on the set of The Proposal, a new comedy starring Bullock as a Canadian desperate to marry her assistant (Reynolds) to secure citizenship. Ironically, in real life, Ryan's the one who hails from the Great White North (Sandra was born in Virginia) - but hey, that's why they call it 'acting'!