Question: Which cast member of the 1975 film Teenage Hitchhiker was born in 1949?

Context paragraphs:
Henry Gibson: Henry Gibson (September 21, 1935 – September 14, 2009), born James Bateman, was an American actor, singer, and songwriter.  He was best known as a cast member of the TV sketch-comedy series "Rowan & Martin's Laugh-In" from 1968 to 1971, for his portrayal of diminutive country star Haven Hamilton in Robert Altman's 1975 film "Nashville", for his role as the "Illinois Nazi" leader in the 1980 film "The Blues Brothers", and for his recurring role as Judge Clark Brown on "Boston Legal".

Freddy Rodriguez (actor): Freddy Rodriguez (born January 17, 1975) is an American actor known for playing the characters Hector Federico "Rico" Diaz on HBO's "Six Feet Under" and El Wray in Robert Rodriguez's "Planet Terror".  In 2007 he was a recurring cast member on the series "Ugly Betty" as Giovanni "Gio" Rossi.  In 2016, Rodriguez became a cast member in the CBS courtroom drama "Bull".

Teenage Hitchhikers: Teenage Hitchhikers is a 1975 American exploitation comedy film written by Rod Whipple and directed by Gerri Sedley.  The film stars Chris Jordan, Sandra Peabody, Claire Wilbur, and Margaret Whitton.

Christopher Masterson: Christopher Kennedy Masterson (born January 22, 1980) is an American actor and disc jockey known best for his role as Francis on "Malcolm in the Middle".  He is the younger brother of "That '70s Show" cast member Danny Masterson, older brother of "The Walking Dead" cast member Alanna Masterson, and older brother of "Last Man Standing" cast member Jordan Masterson.

Made in Chelsea: South of France: Made in Chelsea: South of France, a spin-off series of Made in Chelsea, a British structured-reality television programme, was confirmed on 8 June 2016, and began airing on 1 August 2016.  and concluded after six episodes on 5 September 2016.  It was announced that the cast of "Made in Chelsea" would be travelling to Cannes to film a special series of the show.  It was revealed that this would be a stand-alone series which would not be promoted as the twelfth series.  The twelfth series followed in October 2016.  This is the third spin-off show filmed away from Chelsea following "" in 2014 and "" in 2015.  The series featured the return of former cast member Francis Boulle.  Whilst most of the Chelsea cast featured in this spin-off, there was notable absences from Josh "JP" Patterson, Richard Dinan and Rosie Fortescue.  It is the only series to include French cast member Lukas Avalon, the last to include Louise's ex-boyfriend Alik Alfus, and first to include her new boyfriend Ryan Libbey.  The series focused heavily on the love triangle between Francis, Olivia and Toff before he finally chooses to be with Olivia causing bitterness for Toff, as well as both Jess and Ollie finding holiday romances.  It also included the demise of Alex and Jamie's long-term friendship as Jamie chose to believe Frankie over Alex following multiple revelations.

Kenan Thompson: Kenan Thompson ( born May 10, 1978) is an American actor and comedian.  He is known for his work as a cast member of NBC's "Saturday Night Live".  In his teenage years, he was an original cast member of Nickelodeon's sketch comedy series "All That."  Thompson is also known for his roles as Kenan Rockmore in the sitcom "Kenan & Kel", Russ Tyler in "The Mighty Ducks" franchise, Dexter Reed in the film "Good Burger", and "Fat Albert" as the title character.  In his early career, he often collaborated with fellow comedian and "All That" cast member Kel Mitchell.  He is ranked at #88 on VH1's 100 Greatest Teen Stars.

Ellen Cleghorne: Ellen Cleghorne (born November 29, 1965) is an American actress and comedian, best known as a cast member of "Saturday Night Live" from 1991 to 1995.  Cleghorne was the sketch comedy show's second African-American female repertory cast member, succeeding Danitra Vance in its eleventh season, and the first African-American female cast member to stay for more than one season.  She returned for its 40th anniversary special on February 15, 2015.  Cleghorne was ranked the 69th greatest "Saturday Night Live" cast member by "Rolling Stone" magazine.

Caroline Williams: Caroline Williams is an American actress and producer.  She made her film debut in the 1975 film "Smile".  She is best known for role as Stretch in "The Texas Chainsaw Massacre" film series.  Her other film roles include "Alamo Bay" (1985), "The Legend of Billie Jean" (1985), "Stepfather II" (1989), "Days of Thunder" (1990), "How the Grinch Stole Christmas" (2000), "Halloween II" (2009), and "Hatchet 3" (2013).  Williams has made guest appearances on several television series such as "Hunter" (1987), "Murder, She Wrote" (1992), "ER" (1996), "Suddenly Susan" (1996), "Sabrina, the Teenage Witch" (1997), "The District" (2003), and "Grey's Anatomy" (2010).

Margaret Whitton: Margaret Ann Whitton (November 30, 1949 – December 4, 2016) was an American stage, film, and television actress.

Something to Hide: Something to Hide (in the U.S. also reissued as "Shattered"), is a 1972 British thriller film, written and directed by Alastair Reid, based on a 1963 novel by Nicholas Monsarrat.  The film stars Peter Finch, Shelley Winters, Colin Blakely, Linda Hayden and Graham Crowden.  Finch plays a man harassed by his shrewish wife (Winters) who, after picking up a pregnant teenage hitchhiker (Hayden) is driven to murder and madness.  The film was not released commercially in the United States until 1976.

Supporting paragraphs: Teenage Hitchhikers Margaret Whitton
Answer: Margaret Whitton