Barrowman told TheTVAddict:
"Actually, the first time Alex and I met each other ... we didn’t even say anything, we just looked at each other and went, “Aaaaaahhh! My god!” We got a glass of champagne and started talking about how it would be great if River and Jack – actually, she said River and Jack should have their own TV show."
"Then as we talked more, we realized that we’re both born on the same day. We’re both March 11th babies and we have so much in common. We like a lot of the same things and our attitude towards stuff is very, very similar. It struck a chord with us because that’s why River and Jack are very similar characters, in their attitude and their fun and their aggression, we are the same in real life – which is really ironic. So we struck it off."
"Then she came on Arrow, again we saw each other in the makeup trailer and just screamed. We both said, 'Boy, there’s going to be some fan-gasms out there in a couple of weeks!' It was brilliant."