The suggestion that I'd slept with Tony Leung on set was a disgusting allegation. Jean-Jacques Annaud had a lot to do with that – he was trying to promote the film. ... I felt exploited by him. He never dispelled the rumours. He would walk into a room and be ambiguous, which ignited the fire. Everywhere I went in the world, the rumour followed me.
After being spotted on the cover of Just Seventeen by French Director Jean-Jacques Annaud, she was chosen to play the female lead in his 1992 film The Lover, based on a semiautobiographical novel by Marguerite Duras. False rumours that the sex scenes between March and her co-star Tony Leung Ka-fai in the film had been real and not simulated led to her being dubbed "The sinner from Pinner". Speaking about the rumours in 2004, March said:
While Color of Night was in production, March began dating the film's co-producer Carmine Zozzora. The couple married in June 1993 in an 11-minute ceremony at which Willis was the best man and Demi Moore was the maid of honour. They separated in 1997 and finally divorced in 2001.
Two years after The Lover, she co-starred with Bruce Willis in the erotic thriller, Color of Night (1994), directed by Richard Rush. The script was the first March had received since The Lover. She later said, "I didn't like the script at all, but it was a Bruce Willis film and I wasn't going to turn it down". She also had reservations about the nudity required by the part: she planned to require the filmmakers to alter some nude scenes, but she eventually did not do so because her working experience on the film was very happy. She went on saying, "I wasn't at all comfortable with the nudity in Color of Night. ... At least in The Lover the scenes were relevant to the script. In Color of Night they were just gratuitous."
March continues to perform occasionally. She appeared in Will in 2011, while her latest role was Queen Gwendolyn in Grimm's Snow White released in 2012 for TV.