Her probable biggest role was in another Hammer production, Captain Clegg (1962), aka Night Creatures (US title), playing alongside Peter Cushing and Oliver Reed again, this time as his fiancée.
She also appeared alongside Sean Connery twice, in Action of the Tiger (1957), and the gangster film The Frightened City (1961), where she shared equal billing with the pre-Bond star.
Romain also co-starred in the Danger Man episode titled Sabotage in 1961, and in the 1964 mystery film Smokescreen alongside Peter Vaughan.
Romain moved to Los Angeles and starred alongside Ann-Margret in The Swinger (1966), and Elvis Presley in Double Trouble (1967), which she herself calls a 'dreadful film',[1] though she enjoyed the experience.
He composed musicals (including Stop the World I Want to Get Off, Scrooge, and Willy Wonka and the Chocolate Factory) and was also the lyricist for the titular James Bond film songs Goldfinger and You Only Live Twice.