Siggins, a former member of the British South Africa Police[2] and an expert animal handler, worked on the film The Four Feathers (1921), and later wrote a book about the experience, Shooting with Rifle and Camera.

After working as a window dresser, by 1944 Adams was an assistant artist at Mr & Mrs Jones, a department store, where she was required to attend fashion shows and sketch the clothes.

The same year, Jill Adams had a part in a late-night stage revue, On with the New, starring Anthony Newley, and she began taking bit roles in movies[5] – dancing with Nigel Patrick in Forbidden Cargo, appearing in The Young Lovers (1954), The Black Knight (1954), Out of the Clouds (1955), the Arthur Askey comedy The Love Match (1955), and in Doctor at Sea (1955) with Dirk Bogarde.

Her most notable films were comedies, at which she excelled, such as Doctor at Sea (1955), Value for Money (1955),[6] Private's Progress (1956), Brothers in Law (1957) and The Green Man (1956), in which she starred with Alastair Sim and George Cole.

The Yellow Teddy Bears (1963) was an exploitation thriller (its US title was Gutter Girls), and her small role in Promise Her Anything (1965), starring Warren Beatty and Leslie Caron, was to be her last.

At the peak of her acting career in 1957, Adams married the well-known BBC TV and radio personality Peter Haigh, and had a second daughter, Peta Louise.