US talk show host Oprah Winfrey was amazed when Tom Cruise displayed his love for Katie Holmes by jumping euphorically on her sofa - because she didn't believe the romance was real.

The high-profile couple, who are now engaged and expecting a baby, began dating in April (05) but were immediately accused of orchestrating a publicity stunt to promote new movies Batman BEGINS and War of the Worlds.

Winfrey admits she agreed with the critics, and was stunned by Cruise's exhibitionist behaviour.

She says, "It was wilder than it was appearing to me. I was just trying to maintain the truth for myself because I couldn't figure out what was going on.

"I was not buying - not buying or not buying. That's why I kept saying 'you're gone, you're really gone'."