On the Set with Tom Cruise & Cameron Diaz

Tonight, only ET’s Mary Hart is with Tom Cruise and Cameron Diaz on the top-secret Boston set of their new action-comedy, ‘Knight & Day’ — and we have a sneak peek at their sit-down!

After letting loose in last year’s ‘Tropic Thunder,’ Tom shows off more of his comedic chops in ‘Knight & Day,’ and Cameron reports, “He’s so funny!”

As for the overall feel of the film, she clarifies, “It’s not like a wacky comedy; the situations are kind of absurd.”

“It’s a fun character comedy; adventure, romance — I don’t want to give away too much,” adds Tom. “Girl meets boy, boy sees girl, girl sees boy, adventure ensues.”

Watch ET tonight for much of Mary’s interview with Tom and Cameron!

The highly anticipated ‘Knight & Day’ hits theaters next July, 2010.