The fictional character of Hannah Webster is a warlock that appeared on the televison series, Charmed. Hannah was played by actress Leigh-Allyn Baker.

Hannah was able to ignite fires with her breath, as well as to change her shape. After being sent from the Underworld, she managed to pose as an employee of Buckland Auction House, with a fellow warlock, Rex Buckland, who was posing as the owner of said auction house. Their mission was to acquire the powers of the Charmed Ones. Hannah, along with Rex, began to watch the oldest of the Charmed Ones, Prue Halliwell, once Prue had been hired at the auction house.

For several months, Rex and Hannah watched and waited until they saw an opportunity to take the powers. For her part in the plan, Hannah had murdered a security guard who worked at Buckland's, and then helped Rex to frame Prue of said murder. The plan being that the sisters would trade their powers to the two Warlocks, in return that Rex would clear Prue of the crime. The sisters relinquished their powers, which flowed into a lantern Rex had provided for them. They gave him the powers, but Rex planned to kill them. Hannah, using her shape shifting powers, turned into a black panther and charged the sisters, but the intervention of the whitelighter known as Leo Wyatt saved them. The Halliwells regained their powers at the last second and used them against Rex and Hannah. Following their defeat, Rex and Hannah vanished, presumably recalled to the Underworld. Their subsequent fate remains a mystery.

Although Hannah and Rex never reappeared on the show again, the characters have returned in several fanfictions.