Blanchett, 44, was seen visiting the Shamrock Social Club with her husband Andrew uptown, and her fellow Oscar nominee Amy Adams, on March 3, reported Daily Mirror.
"Cate was spotted leaving the tattoo parlour with a black bandage around her wrist," a source said.
It is still unclear what design Blanchett went for, with a staff member at the Shamrock declining to comment on their A-lister visitor's inking.
"Congrats to our friends Jared Leto and Cate Blanchett for your Oscar wins! (sic)," the tattoo parlour tweeted.