Spoilers for “The Last Sharknado: It’s About Time” are on lock until Syfy premieres the movie Sunday night. However, after five previous movies, fans know to expect some fun celebrity cameos in “Sharknado 6.”

While other “Sharknado” movies had over a dozen appearances from familiar faces, the sixth and final installment seems to have fewer announced. Ian Ziering’s former “Beverly Hills, 90210” co-star Tori Spelling will be joining the cast. Judging from photos released by Syfy, she’ll be playing a character in the 1950s.

Fans can also expect to see Spelling's husband, Dean McDermott, in the flick. Ziering revealed that Spelling and McDermott will play a couple — Fin’s parents.

“Anytime I get a chance to see my old castmates again, it’s always a party,” Ziering told Us Weekly. “Having them play Fin’s mom and dad … I had to think through a little bit. But they did an amazing job. It was great to work with them both.”

Sharknado 6 celebrity cameos "Sharknado 6" will feature Tori Spelling and Dean McDermott as well as several other celebrity cameos. Photo: Anastasiya Sergienya/Fells Point Productions/Syfy

According to the movie’s IMDb page, La Toya Jackson, “Mean Girls” star Jonathan Bennett, Dee Snider of “Twisted Sister,” scientist Neil deGrasse Tyson, Alaska from “RuPaul’s Drag Race” and “Saturday Night Live” alum Darrell Hammond are also among the celebrities making appearances in “The Last Sharknado.” Some will be cameos, but some might have bigger roles.

Hardcore “Sharknado” lovers will recognize another cameo from “Sharknado” creator Thunder Levin. The writer is the sole screenwriter credited for the first four “Sharknado” movies and he co-wrote the fifth one with Scotty Mullen. Though Mullen took over for the final film, Levin will still be in a quick scene.

“Although I didn't write this one (of course it wouldn't even exist without me...), I do have a credit, and if you look real close, a cameo in the final scene!” he wrote on Twitter.

Though this is the last outing for “Sharknado,” the filmmakers couldn’t get every celebrity cameo they wanted. Football player Rob Gronkowski was apparently at the top of their list, but they just couldn’t make it work.

“The one cameo I regret was that we never got Rob Gronkowski, who by the way was like the longest one we kept chasing over and over again,” Chris Regina, Syfy’s former head of original films, told Syfy Wire. “He wanted to be in ‘Sharknado,’ and after so many of them, we could just never get the schedule together for him. We always wanted him spiking a shark.”

Fans can see which celebs make surprise cameos when “The Last Sharknado: It’s About Time” premieres Sunday at 8 p.m. EDT on Syfy.