Samantha Kidd, 44, pleaded guilty to four counts of assault by beating of the 54-year-old wheelchair-bound star days before she was due to face a two-day trial last month.
Brighton Magistrates' Court heard that unemployed Kidd tried to throttle him, slapped him on the the face and chest and kicked him.
Kidd, of High Street, Seaford, dressed in a floral dress, showed no emotion as district judge William Ashworth sentenced her to five months' prison, concurrent on each count, and imposed a restraining order
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A man from Eastbourne who was stabbed by the Westminster attacked has told ITV Meridian he should have been jailed in 2003.