Tom Cruise & Katie Holmes — Holding Hands in Iceland … 2 WEEKS AGO

Exclusive0629_tom_cruise_katie_holmes_splashTom Cruise really had NO CLUE Katie Holmes planned to file for divorce — at least judging by this photo, showing what appears to be a blissfully ignorant Tom clinging to his soon-to-be ex-wife … just two weeks ago.

The photo was snapped on June 16th in a city called Reykjavik — where Tom”s been filming his new movie — and by the looks of it, Tom wasn”t suspecting a thing as far as divorce was concerned … walking around hand-in-hand with Katie.

And Katie didn”t let on either.

The pic is even more proof Tom was “blindsided” by the divorce papers.

our sources broke the story … Katie filed divorce docs against Tom in New York yesterday, citing “irreconcilable differences.”

The primary difference … Scientology.