Casting: deciding on actors and back-up.

For our cast we needed two + -30 years old man and woman to play a married couple.

We've actually came up with the actors quite quickly, but were not sure who should be 1st choice and who a back-up.

After a couple of days we've decided: 

First choice = Chris (theater teacher) and Bethan (psychology teacher).

and back-up = Dan (music technology) and Clare (sociology).