Anne Boleyn was either about 29 or about 35 years old when she died. The uncertainty arises because her birth year is not definitively known, with historians debating between around 1501 and 1507 as her birth year. She was executed on May 19, 1536, so depending on which birth year is correct, she was either about 29 (if born in 1507) or about 35 (if born in 1501) at the time of her death.