The 10 star admits she's struggling to find good roles as she approaches her 60s - and she sympathises with those who are trying to keep more mature actresses onscreen.

The 58-year-old actress says, "I have missed out on parts and I don't play the parts I used to play. I've been a producer (and) I wouldn't cast me in a lot anymore.

"I'm guilty too; I like to look at younger faces on the screen, and most of our stories are told by younger people because they're the ones that would make a difference in a plot or a storyline, most of the time."

Derek has a cameo in the latest Sharknado movie - as the mother of Tara Reid's character - and she showed off her photography skills by capturing her onscreen daughter and co-star Ian Ziering for the new cover of America's TV Guide magazine.