Romeo and Juliet: Act 1, Scene 5
When Romeo and Juliet interact for the first time they immediately begin to “talk in sonnets”. The religious nature of their “conversation” and their language of martyrdom ultimately predicts their upcoming tragic love affair.
Read the side-to-side translation here: http://nfs.sparknotes.com/romeojuliet/page_58.html
This link, and the following video, provides some analysis of the shared sonnet
This blog post offers a pretty solid discussion of this scene and the use of the sonnet as a literary and story telling device.