Dame Mary Doreen Archer, Lady Archer of Weston-super-Mare, DBE is a British scientist specialising in solar power conversion. She studied chemistry at St Anne's College, Oxford, and physical chemistry at Imperial College London, before becoming a Cambridge University lecturer. From 1988 to 2000 she was Chairwoman of the National Energy Foundation, which promotes renewable energy, and is now its president. In 2002 she was appointed Chairwoman of Addenbrooke's NHS Trust, Cambridge. In 2002 she received the Melchett Medal on Realistic opportunities for renewables: innovative technology
Mary Doreen Weedon became Mrs. Mary Archer when she married Jeffrey Archer in 1966. When he was granted a life peerage in 1992, she gained the title Lady Archer of Weston-super-Mare. In 1987 she gave evidence at the High Court in a libel case brought by her husband against the Daily Star newspaper. During his summing up at the end of the trial, Mr Justice Caulfield asked: "Has she elegance? Has she fragrance? Would she have, without the strain of this trial, radiance?"
In 2001, when Jeffrey Archer was accused of perjury in the earlier trial, she appeared at the Old Bailey to defend him. Jeffrey Archer was subsequently convicted and imprisoned for perjury. She is reported to have once said, "Jeffrey has a gift for inaccurate precis".