Actress Judy Carne, 46, was released Monday from prison after serving two months for a drug conviction.
She escaped injury the night before when another prisoner tried to attack her with a pair of scissors, the Home Office said.
The woman prisoner was said to have lunged at Carne with the scissors, but another inmate and a prison officer stepped in to prevent her being injured. The officer was cut in the struggle but Carne was unhurt, the report said.
There was no indication of the reason for the attack.
Carne, former wife of actor Burt Reynolds, had admitted smuggling cocaine and marijuana into Heathrow Airport and having cocaine and amphetamines at her home in Northamptonshire county.
She left the Cookham Wood Jail in Kent county, south of London, in a white Mercedes-Benz.
Carne gained fame in the 1960s as the "sock it to me" girl on "Rowan and Martin's Laugh-In."