Lillian Peacock (born Lillian Melvina Webb; October 23, 1889 – August 18, 1918) was an American actress known primarily for her work in silent film.

The eldest daughter of the Webb movie family, Lillian's time in Hollywood was cut short after sustaining a serious injury while filming comedy shorts for Universal in 1916; though she was back to work only a few months after, Peacock later became incapacitated and died due to complications from her injuries August 18th, 1918, at only 28 years old.