Star admits to event being a 'blur'

The other Leo — former suds star Josh Duhamel — got his first taste of bigscreen idolatry during Friday night’s preem for “Win a Date With Tad Hamilton!”

Duhamel, who left behind “All My Children” heartthrob Leo to play bigscreen heartthrob Tad Hamilton, seemed a bit dazed at the W Hotel after-party. “The whole last hour was a blur,” admitted the thesp, moments after accepting congrats from DreamWorks co-topper Jeffrey Katzenberg.

Duhamel’s following came as a surprise to Aussie helmer Robert Luketic, who was nonplussed to hear fans yelling “Leo” during shooting. Thinking they had mistaken his thesp for the “Titanic” star, the director “went over and told them, ‘What are you talking about? He’s Josh Duhamel. You’re insulting him,’ ” Luketic recalled.

Producer Doug Wick admitted they weighed the benefits of casting an unknown vs. a big star.

“We talked with a few movie stars, but no one really wanted to make fun of themselves,” Wick said.

In the meantime, Duhamel gained attention on “Las Vegas” — forcing filmmakers to scotch a marketing campaign designed to give moviegoers the impression he really was Tad Hamilton.

Judging by the reaction to the thesp Friday, however, he already is Tad Hamilton.

Also on hand: DreamWorks’ Walter Parkes and Laurie MacDonald; co-producer Lucy Fisher; scribe Victor Levin; and pic’s Kate Bosworth, Topher Grace, Ginnifer Goodwin and Gary Cole.

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