However, it's impossible to say when they will dye their hair for a specific role because:
* They are not obligated to dye their hair for anything: They can choose to dye their hair for a role, but they are not required to.
* Their current projects are unknown: There is no public information about upcoming projects that would require hair dyeing.
* Hair dyeing is a personal choice: The actors may choose to dye their hair for personal reasons, not just for acting roles.
If you want to know when they might dye their hair for a specific role, you'll need to stay tuned for casting announcements and news about upcoming projects!