Bradley Cooper keeps it serious while filming scenes for his upcoming movie American Sniper on Monday (May 19) in Los Angeles.
The 39-year-old actor was joined on set by his co-star Sienna Miller, who was spotted chatting with director Clint Eastwood.
PHOTOS: Check out the latest pics of Bradley Cooper
Last week, Bradley showed off his huge arms while chatting with crew members on set.
It was recently announced that Mark Mothersbaugh will be scoring Cameron Crowe Untitled Project, which stars Bradley, Emma Stone, Rachel McAdams, Alec Baldwin, and Bill Murray.
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