The Parent Trap (1961) is a Walt Disney Productions feature film starring Hayley Mills, Maureen O'Hara and Brian Keith in a story about teenage twins and their divorced parents. The screenplay by the film's director David Swift was based upon the book Lottie and Lisa (Das Doppelte Lottchen) by Erich Kästner. The Parent Trap was nominated for two Academy Awards, was broadcast on television, saw three television sequels, was remade in 1998 with Lindsay Lohan, and has been released to VHS and DVD. The original film was Mills' second of six films for Disney.
Sharon calls Susan in Boston with the news that their father is planning to marry a gold-digger and their mother needs to be rushed to California to prevent the union. In Boston, Susan tells her mother the truth about the switched identities and the two fly to California.
With both parents and both twins in California, the twins set about (with some slight approval from their mother) sabotaging their father's marriage plans. Mitch's money-hungry girlfriend Vicki Robinson (Joanna Barnes) receives some rude, mischievous treatment from the girls and some veiled cattiness from Maggie. When Vicki is away for an evening, the girls stage a reprise of their parents' first date in Mitch's home with an Italian dinner and a gypsy violinist. The former spouses are gradually drawn together.
Vicki however digs her heels in regarding Mitch and marriage, but the girls effect the coup de grace on a wilderness camping trip: Vicki spends her time swatting mosquitoes after dousing herself with a sugar and water "mosquito repellent" given her by Sharon and Susan, and finds her sleep interrupted by two bear cubs who are drawn to her tent by a trail of honey left by the twins. Exasperated, Vicki gladly tosses in the towel. Mitch and Maggie rekindle the love they once held for each other and the two remarry in the final scene with the twins as members of the wedding party.
Cast includes Cathleen Nesbitt and Charles Ruggles as the girls' maternal grandparents, Una Merkel as Mitch's sympathetic housekeeper Verbena, Ruth McDevitt and Nancy Kulp as summer camp staff, and Leo G. Carroll as Reverend Mosby. Hayley Mills' father John appeared in the uncredited role of a golf caddy while Susan Henning was Hayley Mills' uncredited body double for several of the "twin" shots in the film.
The film was shot mostly in California at various locales, including millionaire Stuyvesant Fish's 5,200 acre (21 km²) ranch in Carmel, Monterey's Pebble Beach golf course, and the studio's Golden Oak Ranch in Placerita Canyon, where Mitch's ranch was built. It was also shot in Camp Cedar Lake, in the Angeles National Forest 5 minutes from Big Bear Lake, California. It was the design of this set that proved the most popular, and to this day the Walt Disney Archives receives requests for plans of the home's interior design. Of course, there never was such a house; the set was simply various rooms built on a sound stage. Camp Inch was based on a real girls' camp called Camp Crestridge for Girls near Asheville, North Carolina.