"I love The Little Mermaid, so that's a tricky one, but I'm keeping to it. She is, however, allowed to (watch) — (Finding) Dory is a big favourite in our house. Frozen is huge; Moana is totally fine. There are some great ones."
We're sure her employers at Disney will be relieved to hear that: Knightley was on The Ellen Show to promote her starring appearance as the Sugar Plum Fairy in the upcoming live action blockbuster, The Nutcracker and the Four Realms.
Disney classics aren't the only targets the outspoken star has had in her sights recently: Earlier this month she blasted Kate Middleton's "perfect" post-birth appearance.
She said Kate's perfectly made-up appearance as she left hospital just hours after giving birth to Princess Charlotte in 2015, one day after Keira had Edie, is a far cry from reality.
In her essay "The Weaker Sex", which appears in the collection Feminists Don't Wear Pink (And Other Lies), Keira wrote: "We stand and watch the TV screen.
"[Kate] was out of hospital seven hours later with her face made up and high heels on. The face the world wants to see.
"Hide. Hide our pain, our bodies splitting, our breasts leaking, our hormones raging.
"Look beautiful. Look stylish, don't show your battleground, Kate. Seven hours after your fight with life and death, seven hours after your body breaks open, and bloody, screaming life comes out.