Toby Regbo follows Adelaide Kane onto the Reign set at Christ Church in Dublin, Ireland on Tuesday afternoon (April 9).

The 21-year-old actor plays Prince Francis in the CW pilot, who is thoughtful and very nervous about inheriting his throne. He doesn’t know if an arranged marriage is what is best for him, and is having an affair.

“I’m dressed like the medieval matrix,” Toby wrote on Twitter.

Director Brad Silberling has also been posting behind-the-scenes pics from filming and include Anna Popplewell, Caitlin Stasey, Celina Sinden and Jenessa Grant — all the ladies in waiting.

Reign chronicles the rise to power of Mary Queen of Scots (Kane) when she arrives in France as a 15-year-old, betrothed to Prince Francis, and with her three best friends as ladies-in-waiting.

10+ pics inside…