Sienna Miller's New Boyfriend Lucas Zwirner Joins Her in Paris!

Sienna Miller leaves her hotel with new boyfriend Lucas Zwirner on Tuesday afternoon (March 5) in Paris, France.

The 37-year-old actress is in town for Paris Fashion Week and she was spotted attending the Louis Vuitton show that afternoon.

PHOTOS: Check out the latest pics of Sienna Miller

Sienna was seen flying into town the day before with Lucas, 27, by her side.

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.

FYI: Sienna is wearing Kenmark Eyewear x Gemma Styles sunglasses at the airport.