Katie Holmes: Post Office with Suri!

Katie Holmes heads into a post office with her daughter Suri on Friday (September 16) in Brentwood, Calif.

The 32-year-old actress and her 5-year-old cutie went to an office building in Los Angeles afterward.

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Later in the day, Katie was being driven around town by a driver when the car was pulled over by a police officer.

Law enforcement sources told TMZ that the driver was talking on his cell phone, but got away with just a warning.