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LOS ANGELES (AP) _ Shaggy's a dad.

Matthew Lillard, who plays the ditzy, latter-day beatnik Shaggy in the live-action adaptation of ``Scooby-Doo,'' became a father last Thursday. Lillard's wife, Heather, gave birth to a baby girl on the day before ``Scooby-Doo'' opened.

The couple, who were married in 2000, named their daughter Addison Grace Lillard. The baby weighed 6 pounds, 10 ounces.

The 32-year-old Lillard also has appeared in ``13 Ghosts,'' ``Scream'' and ``Serial Mom.''

``Scooby-Doo'' opened as the runaway No. 1 film over the weekend, scaring up a huge debut of $54.2 million. The film co-stars Freddie Prinze Jr., Sarah Michelle Gellar, Linda Cardellini and a computer-generated version of the goofy title character, a talking Great Dane.