- Took the role of Lily Munster on The Munsters (1964) to help pay husband Bob Morgan's medical bills. Morgan, an actor and stuntman, had suffered near-fatal injuries while filming How the West Was Won (1962). By her own admission, De Carlo never imagined, at the time, that the show would become such a hit. She also had mixed feelings about the show; she was grateful it returned her to the spotlight but felt its popularity tended to overshadow the rest of her career.
- Regarded Mười Điều Răn Của Chúa (1956) as her best film. She was nominated for the Laurel Award for Best Supporting Actress for her performance. In her autobiography and in a book about the film, she said that it is a timeless film that her descendants will see.
- She was greatly admired by Italian actress Sophia Loren, who grew up watching De Carlo's early films. In 1965, Loren told columnist Dick Kleiner: "Particularly I loved Yvonne De Carlo - she was my favorite [actress]. Others too, like Rita Hayworth, but I used to dream I was Yvonne De Carlo. And I liked that little one - what was her name? - June Allyson, too. But for me there was only one Yvonne De Carlo". At the 1954 Berlin Film Festival, De Carlo and Loren posed for a photograph with Gina Lollobrigida.
- In her final years, she resided at the Motion Picture and Television Hospital.
- Eva Perón, First Lady of Argentina from 1946 to 1952, was a great fan of hers. According to De Carlo's autobiography, Perón told the Hollywood film star that she enjoyed every one of her movies and that her favorite was Buccaneer's Girl (1950). Perón also said that she wanted De Carlo to portray her in a biopic. Before De Carlo left Argentina, Perón gave her a copy of her autobiography in which she inscribed: "A remembrance of your passing through Argentina, with my gratitude for your kindness toward me. With my best wishes for your happiness always and a big hug - Eva Perón".
- Remained good friends with Butch Patrick, during and after The Munsters (1964).
- She was awarded 2 Stars on the Hollywood Walk of Fame for Motion Pictures at 6124 Hollywood Boulevard; and for Television at 6715 Hollywood Boulevard in Hollywood, California.
- Before she starred on The Munsters (1964), she was deeply in debt. Her film career was in decline and she was suffering from depression.
- An accomplished singer since childhood, she sang in most of her films of the 1940s and 1950s. She also sang and played the harp in Far Out Munsters (1965).
- Her maternal grandfather, Michele "Papa" De Carlo, was Sicilian. Her maternal grandmother, Margaret Purvis, was Scottish. Michele met Margaret in Nice, France, and they married in 1897. Yvonne's mother, Marie, was born in Nice in 1903. The De Carlo family moved to Canada in 1912.
- Won second place in the Miss Venice Beach contest of 1940. The prize was a check for $25. Sir Cedric Hardwicke, her future co-star in Mười Điều Răn Của Chúa (1956), was one of the judges. This appearance led to her first job as a nightclub dancer and, eventually, to a successful movie career.
- Before her marriage, De Carlo was known as "Hollywood's No. 1 Bachelor Girl".
- While working as a dancer for showman Nils Granlund at the Florentine Gardens, she was arrested by immigration officials and deported to Canada. In 1941, Granlund sent a telegram to Canadian immigration officials pledging his sponsorship of her in the United States, and affirmed his offer of steady employment, both requirements to reenter the country.
- She had always hoped to receive an Academy Award nomination for her acting. In 1957, Paramount Pictures submitted her name in the Best Supporting Actress category for her performance as Sephora in Mười Điều Răn Của Chúa (1956).
- Became very good friends with Cecil B. DeMille, her director in Mười Điều Răn Của Chúa (1956). He admired her acting talent and beauty, and she had always wanted to star in one of his films. DeMille cast her as the female lead in his next production, The Buccaneer (1958), but the filming interfered with the pregnancy with her second child and the part was recast. They remained friends and spoke highly of each other in interviews and their autobiographies.
- Though Al Lewis played De Carlo's father on The Munsters (1964), Lewis was actually one year her junior.
- Had mixed emotions when she auditioned for Lily Munster, but she accepted the role because she needed money.
- In her 1987 autobiography, she listed 22 of her lovers over the years.
- Guest-starred on the pilot episode of Bonanza (1959) as Gold Rush entertainer Lotta Crabtree.
- She and Virginia Mayo toured together, signing and dancing in their later years.
- She chose her own stage name by using her middle name and her mother's maiden name of De Carlo. She later explained that she changed her name because she did not look like the all-American girl next door.
- Was trained in opera and was a former chorister at St. Paul's Anglican Church in Vancouver, British Columbia, Canada, when she was a little girl.
- Was briefly engaged to Jock Mahoney in 1949, but she canceled the engagement after she discovered his infidelity.
- After her role in The Barefoot Executive (1995), she retired from acting at age 72.
- Revealed in a 1975 interview that her biological father was not William Middleton but a man of Polynesian origin.
- In the 1950s, she made films in England, France, the Bahamas, Germany and Italy. Although she traveled to Egypt to visit DeMille, all of her scenes in Mười Điều Răn Của Chúa (1956) were shot at Paramount Studios.
- Dropped out of King Edward High School at age 15 (which was her sophomore year), to focus more on her dance studies, hence, she attended B.C. School of Dancing.
- Comedienne Vicki Lawrence said De Carlo was her childhood television heroine. De Carlo revealed that she was Lawrence's number-one fan.
- The first Hollywood actress to play the leading role in a French film without an English-language version. The film was La contessa di Castiglione (1954).
- Received fifth star billing (after Heston, Brynner, Baxter, and Robinson) in Best Picture Academy Award nominee Mười Điều Răn Của Chúa (1956), the most important and famous film of her career and one of her personal favorites.
- She lived with her maternal grandparents whenever her mother was away from home.
- Was one of four actresses to be nicknamed "Queen of Technicolor". The other three were Maria Montez, Maureen O'Hara and Rhonda Fleming. Hollywood cameramen voted De Carlo "Queen of Technicolor" three years in a row.
- She was the producers' second choice to play Lily Munster, after Joan Marshall was dropped from consideration for the role of Phoebe Munster (the original name of the "Mrs. Munster" character).
- Was very good friends with: Jane Wyman, Angela Lansbury, Fred Gwynne, Al Lewis, Zsa Zsa Gabor, Bob Hastings, Mel Blanc, John Carradine, John Ireland, Norman Lloyd, Barbara Nichols, Doug McClure, Joel McCrea, Bob Hope, Frank Sinatra, Sammy Davis Jr., Dean Martin, Dan Duryea, Billy Barty, Richard Arlen, Broderick Crawford, Kevin Burns, Marsha Hunt, Julie Adams, Piper Laurie, Ricardo Montalban, Charlton Heston, Rod Cameron, Raymond Burr, Mickey Rooney, Joan Caulfield, Ruth Hussey, Marie Windsor, Laraine Day, Virginia Mayo, Barbara Billingsley and Rock Hudson.
- Was named the Honorary Mayor of North Hollywood in 1966.
- She had six hobbies: spending time with her family, golfing, dancing, drinking wine, listening to music, singing.
- Met Bob Morgan on the set of Shotgun (1955). They were married for 19 years, until their divorce in 1973.
- Was interviewed by film historian and author Katherine Orrison for the book "Written in Stone: Making Cecil B. DeMille's Epic The Ten Commandments" (1999). Orrison dedicated chapter 12 to "Mrs. Moses: Yvonne De Carlo".
- Was presented to Queen Elizabeth II and Prince Philip in 1952 at Empire Theatre, Leicester Square in London. It was Queen Elizabeth's first Royal Film Performance, and De Carlo was one of several celebrities who lined up to be presented to the Queen. "I was really impressed with her great dignity and spirit of authority," wrote De Carlo in her book.
- In 1982, years after she had sold her Coldwater Canyon estate, she bought a ranch in the Santa Ynez Valley and became a neighbor of Ronald Reagan and Nancy Reagan.
- She was a staunch Republican and conservative who was active in the campaigns of U.S. presidents Richard Nixon, Ronald Reagan and Gerald Ford. She once described her political views as "to the right of Big John Wayne".
- Before she was a successful actress, she was a dancer and had worked at various nightclubs in Vancouver, British Columbia, and later in Los Angeles, California.
- Was one of Universal Pictures' top box-office draws from the mid-1940s to the early 1950s.
- Left work temporarily in the early 1960s to take care of her disabled husband, Bob Morgan.
- Her starring role as Lily Munster on The Munsters (1964) gave her a new generation of fans.
- In 1963 and 1964, De Carlo joined fellow actresses Joan Caulfield, Ruth Hussey, Marie Windsor, Laraine Day, Virginia Mayo and Maidie Norman, in making appearances on behalf of U.S. Senator Barry M. Goldwater, the Republican nominee in the campaign against U.S. President Lyndon B. Johnson.
- Her The Munsters (1964) co-star, Butch Patrick, said in an interview that his mother was a great fan of her movies, long before he co-starred with De Carlo in the series.
- Her favorite actress was Vivien Leigh. She watched all of Leigh's films.
- She signed two five-year contracts with Universal/Universal-International Pictures, the studio that made her a star. In the first five years (1945-1950), she mostly appeared in Universal films and was sometimes loaned out to other studios. In the last five years (1951-1955), she made only one Universal film per year, which gave her the freedom to seek film roles for other producers.
- From 1950 to 1975, she lived on a five-and-a-half acre estate on Coldwater Canyon Drive in the hills of Studio City, a neighborhood of Los Angeles situated above Bevery Hills. The house had eleven rooms and a kitchen, which she remodeled, that was designed in the English style with paneling and stained-glass windows. She added stables and a large waterfall swimming pool to the property. Her financial situation after her divorce forced her to sell the ranch in 1975.
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