The Safe Haven star stepped out on Tuesday to celebrate his Moves magazine cover at TOY Restaurant in New York City.
After "glowing" while speaking to photographers, Duhamel had a low-key evening, an onlooker tells PEOPLE. "He sat in a corner of the restaurant and enjoyed dinner."
At his table: several sushi rolls, shrimp toast cigars, tuna toro and mahogany chicken.
Duhamel and wife Fergie announced that they were expecting their first child on Twitter last month.
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