Sienna Miller & Boyfriend Lucas Zwirner Catch a Sunday Show

Sienna Miller steps out with her boyfriend Lucas Zwirner to catch an afternoon show on Sunday (March 10) in New York City.

The 37-year-old actress was spotted sharing a kiss with Lucas, 27, while heading into a theater downtown.

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Sienna and Lucas are back in the Big Apple following a trip to Paris last week for fashion week.

Lucas works for David Zwirner Books, the publishing house tied to his family’s art gallery. He is the editorial director and oversees 25 book releases a year.