Longet and Andy Williams were close friends of Senator Robert F. Kennedy and his wife, Ethel Kennedy. During the mid-1960s, they regularly socialized at Longet's and Williams's residences in Bel Air and Palm Springs and at the Kennedy residences at Hickory Hill and New York City. They also took summer cruises on the Salmon River in central Idaho and on the Colorado River.
Longet and Williams met in Las Vegas in 1960 when she was 18 and he was 32. Longet was experiencing problems with her car and had pulled over to the side of the road. Driving by, Williams stopped to offer assistance. She was the lead Dancer of the Folies Bergère revue at the Tropicana Resort & Casino. They married on 15 December 1961 in Los Angeles, and had three children: Noëlle (born on 24 September 1963), Christian (born on 15 April 1965), and Robert ("Bobby") (born on 1 August 1969). They legally separated in 1970 and divorced in January 1975. According to Williams, they remained "very good friends".
Her first appearances as an Actress on television were in two 1963 episodes of the comedy series McHale's Navy. She also acted in the 1964 theatrical feature film of the same title. Many of her acting roles during the 1960s were in episodes of television adventure series that included Twelve O'Clock High, Combat!, The Name of the Game, The Rat Patrol and Hogan's Heroes Episode #20: It Takes a Thief ... Sometimes. Longet was cast as Sharhri Javid in the 1965 episode, "The Silent Dissuaders", of the NBC education drama series, Mr. Novak, starring James Franciscus.
A&M Records cofounder Herb Alpert was among the viewers whom Longet charmed with her performance of "Meditation". When Alpert met Longet by happenstance at a club in New Orleans later in 1966, he offered her a recording contract with his company. Longet recorded singles, and five albums, for A&M Records between 1966 and 1970.
She also has had hit singles in America on the Billboard Adult Contemporary chart. Her charting singles include her cover version of "Here, There and Everywhere" (music and lyrics by John Lennon and Paul McCartney), "Hello, Hello" (composed by Terry MacNeil and Peter Kraemer), "Good Day Sunshine" (composed by Lennon and McCartney), "Small Talk" (music and lyrics by Garry Bonner and Alan Gordon), and "Love is Blue", a 1967 Eurovision Song Contest entry that gained fourth place (music by André Popp and French lyrics by Pierre Cour [Pierre Lemaire]). Another song, "Wanderlove" (music and lyrics by Mason Williams), went to #7 on the singles charts in Singapore and still occasionally gets airplay on Asian radio. She remains popular in Japan, where all of her original albums were reissued on compact disc.
After the funeral Mass, Longet and Williams boarded the 21-car funeral train that took Senator Kennedy's body to Washington, D.C. and Arlington National Cemetery for burial. Longet and Williams were with Senator Kennedy's body, Ethel Kennedy, Ted Kennedy, and other Kennedy family members in the end car of the train. The front page of the 9 June 1968 edition of the Washington Post has a large photograph that depicts Ted Kennedy and Longet standing together on the rear platform of the funeral train as it passed through North Philadelphia.
Longet and Williams named their son Robert (born in August 1969) in remembrance of Robert Kennedy.
In 1971, she joined Williams' Barnaby Records label. She released singles and two albums for Barnaby, We've Only Just Begun in 1971 and Let's Spend the Night Together in 1972. She also recorded songs for a projected third album for Barnaby that went unreleased. Many of the songs for the planned third album finally appeared on the 1993 compact disc release titled Sugar Me, after the Lynsey de Paul song that Longet covered in the early 70's but the masters for some of the other songs are missing and presumed lost.
In 1975, she appeared as "The Flower" (a nonsinging role) with Richard Burton, Jonathan Winters, and others, on the children's album The Little Prince, based on the Antoine de Saint Exupéry novel. The album won the Grammy Award for Best Album for Children in 1976.
Longet was arrested and charged with fatally shooting her boyfriend, Olympic skier Vladimir "Spider" Sabich, at his Aspen, Colorado, home on 21 March 1976. At her trial Longet said the gun discharged accidentally as Sabich was showing her how it worked. Williams publicly supported Longet throughout the trial, paid for her legal defense team, even escorting her to and from the courthouse. Asked later about his unwavering support of his ex-wife, Williams said, "She is the mother of my children. And we never stopped being friends. We just didn't want to be married any more."
