Career: Wagner's first movie was The Happy Years in 1950. After a handful of blink-and-you'll-miss-them appearances in other films, his big break came in 1952's With a Song in My Heart. Wagner became one of Hollywood's most sought after young actors, appearing in such productions as Titanic, Broken Lance, Prince Valiant, The Pink Panther and The Longest Day. His career dipped a little in the 1960s, but a decade later he was a TV regular with roles in The Streets of San Francisco, Switch and Hart to Hart. The Austin Powers movies and cameos on Two and a Half Men and NCIS have since introduced him to a whole new audience.

Career: During the 1960s and early 1970s, Powers starred in a number of films, including Tammy Tell Me True, Experiment in Terror, McLintock!, a remake of Stagecoach, and Herbie Rides Again, as well as several TV series, taking the lead role in The Girl from UNCLE. However, her biggest success came in 1979 when she teamed up with Robert Wagner for detective drama Hart to Hart. The series ran for five years and won Powers two Emmy nominations. The stars later reprised the roles for a series of TV movies. Since then, she has continued to work steadily, appearing regularly on TV and the stage.

Career: Collins' film debut came in 1951's Lady Godiva Rides Again. Later in the decade she moved to Hollywood to make more movies and US TV series, including Star Trek, The Man From UNCLE and Batman. She also starred in low-budget horrors such as Fear in the Night, and Tales That Witness Madness, and a series of famous adverts alongside Leonard Rossiter. The Stud and The Bitch - movie versions of her sister's novels - turned her into a sex symbol. She became an international star in 1981 thanks to glossy soap Dynasty. Since then she's starred in various TV movies and mini-series appeared on stage and turned to writing. She was awarded an OBE in 2007 for her lifetime contribution to the arts and her charity work and was made a Dame in the New Year's honours list.