Key East Entertainment stated, Joo Ji Hoon has received an offer for Kingdom and is looking over the script.
Prain TPC also stated that Ryu Seung Ryong has also received a casting offer and is looking over the drama. They commented, However this does not mean he is confirmed for the drama. He will decide after thoroughly looking over the drama and speaking with the production team.
Bae Doona has also received an offer for the drama and her agency has also stated that she is also currently positively looking over the script.
Previously, Song Joong Ki also was offered a role in the drama but turned it down in order to focus on his wedding with Song Hye Kyo.
Kingdom is an upcoming Netflix original zombie historical drama penned by Signal and Ghost writer Kim Eun Hee, and will be filming at the end of this year and will be aired sometime next year as a 100 percent pre-produced drama. The drama will be directed by Kim Seong Hun, who also directed the films A Hard Day and The Tunnel.