There are some articles about the sequel to 300 and it says it might have cameo parts for both Lena and Gerard Butler! I don’t know if this is true though but I will try and find out!
Goldmann confirmed that the upcoming sequel/prequel will focus mostly on new faces but that stars from the first film 300, Gerard Butler and Lena Headey do have small roles in the upcoming film if they choose to cameo. “It’s a different story,” he said. “(However) there’s a small part for Lena. There’s a small part for Gerry.”