Proper Way To Congratulate On Engagement When Meeting A Couple Who Just Announced Their Engagement, Is It Proper To Congratulate Both People?

When meeting a couple who just announced their engagement, is it proper to congratulate both people? - proper way to congratulate on engagement

I read somewhere or heard that a man should be praised, cousin was probably the best deal :-)
The woman should know that his, well that sounds good, etc.
Has anybody heard anything?
Two of my friends are short, and I'll probably see them separately .... involved