Haworth was born in Hove, Sussex, to a textile magnate father and a mother Nancy who trained as a ballet dancer.

[3] Haworth's first film appearance was in the remake of The 39 Steps (1959), directed by Ralph Thomas, when she had a non-speaking part as a schoolgirl.

[5] Otto Preminger was seeking a new fresh face for the role of Karen Hansen, an ill-fated Jewish-Danish refugee girl in love with Dov Landau (Sal Mineo), for his film Exodus (1960).

After looking at hundreds of girls, Preminger spotted a photo of Haworth in a modelling magazine for the Corona Theatre School.

[7] She and Mineo appeared on the front cover of the 12 December 1960 issue of LIFE, part of a photo essay by Gjon Mili.

[8] Under contract to Preminger (for five years), she also worked with him in The Cardinal, (1963) as Lalage Menton, and In Harm's Way (1965), as Ensign Annalee Dorne, a Nurse Corps officer who, while engaged to Ensign Jeremiah Torrey (Brandon deWilde), commits suicide after being raped by Captain Paul Eddington, Jr. (Kirk Douglas).

"[15] In 1965, she appeared in an episode of The Rogues entitled "Mr. White's Christmas" as Timothea, and really loved working with David Niven and Charles Boyer.

[16] She appeared in one of the final episodes of the series Rawhide, "Duel at Daybreak", as Vicki Woodruff, alongside co-actors Clint Eastwood and Charles Bronson.

Haworth liked working with Roddy McDowall, who brought her the poster for the film (on her opening night of Cabaret), and wrote "S-h" in front of the title.

[19] Haworth turned down working on Hawaii Five-O because of the reputation of the show's star, Jack Lord, for being a hard-driving perfectionist.