Suri Cruise is a Shrekie, according to "Shrek Forever After" star Cameron Diaz.

"It's funny because Suri does know I'm Princess Fiona," the actress tells People Moms & Babies. "I'm not going to speak for her, but yes, I think she does [love 'Shrek']."

But even though Suri knows Princess Fiona's true identity, Diaz warns other parents not to let the cat out of the bag.

"When parents say to their kids, 'This is Princess Fiona,' I just tell them, 'Let the mystery and the fantasy live within them,'" she explains. "Let them believe that Princess Fiona is actually real."

Suri Grows Up