Jennifer, 53, looked ready to tackle the half-marathon walk alongside 17,000 others who were either doing the half-marathon of 13.
Back in March Jennifer was joined by Dawn French to play the part of bridesmaids in a real-life wedding which took place in aid of Comic Relief.
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She didn't speak publicly about the disease and carried on as normal continuing to appear at public events until she appeared at a fashion show in the July showing her short soft hairstyle, a result of her chemotherapy.
Sanders still occasionally popped up in non-sexual cameo roles in porno flicks starring 1980s adult queen Ginger Lynn.