As of now, there is no official announcement regarding the cast for Season 4 of The Orville. However, based on previous seasons and recent updates, it is likely that the main cast will return. This includes:

• Seth MacFarlane as Captain Ed Mercer
• Adrianne Palicki as Commander Kelly Grayson
• Penny Johnson Jerald as Doctor Claire Finn
• Scott Grimes as Lieutenant Gordon Malloy
• Peter Macon as Lieutenant Commander Bortus
• J. Lee as Lieutenant John LaMarr
• Mark Jackson as Isaac
• Jessica Szohr as Lieutenant Commander Talla Keyali (joined in Season 2)

In August 2024, Scott Grimes provided an update that filming for Season 4 is expected to begin shortly after the new year, suggesting a potential release in 2025, though no official confirmation has been made by Hulu or the show's creators2.