Lincoln and the Louds are ecstatic to welcome their new Gran-Gran, Myrtle, into the family with a tropical wedding celebration; but the festivities are cut short when an old nemesis from Myrtle's secret agent past appears on the island.
Bentley Griffin
as Lincoln (voice)
Alex Cazares
as Myrtle (voice)
Piotr Michael
as Pop Pop / Boat Henchman / Karaoke Patron (voice)
Brian Stepanek
as Dad / Todd / Cargo Shorts Henchman (voice)
Amy Sedaris
as Fifi (voice)
Jessica DiCicco
as Lynn / Lucy (voice)
Lara Jill Miller
as Lisa (voice)
Jill Talley
as Mom / Computer Voice (voice)
John DiMaggio
as Mr. Grouse / Flop / Henchman Mo (voice)
Grey DeLisle
as Lola / Lana / Lily (voice)
Paul Wight
as Ham Hand (voice)
Catherine Taber
as Lori (voice)
