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Olivia Newton-John as Orion, a brilliant scientist who helps defend Australia from a sharknado; Fabio as the pope; Margaret Cho as a fussy bride whose honeymoon is disrupted by the sharks; Tony Hawk as a masterful weapons operative strategist; Charo as the Queen of England; and Clay Aiken as Llewelyn, a cutting-edge technology genius.

Also to star are Bret Michaels, Gilbert Gottfried, Al Roker, Kathie Lee Gifford and Hoda Kotb (Today), Greg Louganis and Tom Daley (Olympic diving medalists), Gus Kenworthy (Olympic freeskiing medalist), Jeff Rossen (NBC News investigative correspondent), and Porsha Williams (The Real Housewives of Atlanta).

More include Tiffany “New York” Pollard (Flavor of Love), Chris Kattan (Saturday Night Live), Cat Greenleaf (Talk Stoop), Dan Fogler (Fantastic Beasts and Where to Find Them), and Ross Mullan (Game of Thrones). Some of the stars will be portraying themselves, while others will play prominent world figures or fictional characters essential to the plot.