As ITV2 confirm that Amanda Holden, Emilia Fox and John Thomson will join the hit comedy later this year.
Amanda Holden will play Rufina, a lusty aristocrat at a banquet, who sets her sights on Jason, the gate-crashing pleb, making him her plaything for the evening.
Also confirmed for guest roles are Tony Robinson, Tracy Ann Oberman, Kevin Bishop, Leo Gregory, Nigel Lindsay and Phil Davis.
They'll star alongside returning cast members Tom Rosenthal, Ryan Sampson and Jonathan Pointing who will reprise their roles as Marcus, Grumio and Jason.
Ellie Taylor, Maureen Lipman, Karl Thobald, Samantha Spiro and Danny Webb are also returning as Gloria, Landlady, Landlord, Sylvia and Lepidus.
Plebs is written by Sam Leifer and Tom Basden, produced by Teddy Leifer, executive produced by Caroline Leddy and directed by Sam Leifer.
Plebs returns this autumn on ITV2