NEW YORK, NY - JANUARY 26: Brad Pitt is seen on the set of "Wolves" on January 26, 2023 in New York City. (Photo by Jose Perez/Bauer-Griffin/GC Images)

NEW YORK, NEW YORK - JANUARY 26: Brad Pitt is seen filming "Wolves" in Chinatown on January 26, 2023 in New York City. (Photo by Gotham/GC Images)

NEW YORK, AL - January 26: Brad Pitt is seen walking to the makeup trailer on January 26, 2023 in New York. (Photo by MEGA / GC Images)

My guess is it's the signet ring.

NEW YORK, NY - JANUARY 26: Brad Pitt and George Clooney are seen on the set of "Wolves" on January 26, 2023 in New York City. (Photo by Jose Perez/Bauer-Griffin/GC Images)

Brad Pitt dresses like a carrot and more star snaps https://t.co/VG1YefM0c4 pic.twitter.com/28RWSPStXL

— Page Six (@PageSix) January 27, 2023