Question: What year was the Mad Men actor who played Betty's ex-husband on the show born?

Context paragraphs:
Public Relations (Mad Men): "Public Relations" is the season premiere of the fourth season of the American television drama series "Mad Men", and the 40th overall episode of the series.  It was written by series creator and executive producer Matthew Weiner, and directed by Phil Abraham.  It originally aired on AMC in the United States on July 25, 2010.  The episode takes place in November 1964, as the advertisement agency Sterling Cooper Draper Pryce has just started up, and Don Draper (Jon Hamm) is struggling with his divorce.  The agency partners are concerned about the narrow breadth of their client base, which is not helped by Don coming across as less than sympathetic in an interview with a trade magazine.  Peggy Olson (Elisabeth Moss) attempts a viral marketing stunt to bring back a disgruntled client, with unexpected repercussions.  Meanwhile, Don's ex-wife Betty (January Jones) is struggling to fit in with her new family, and Don encounters problems in his romantic life.

Betty Draper: Elizabeth "Betty" Hofstadt Francis (formerly Draper) is a fictional character on AMC's television series "Mad Men", portrayed by January Jones.  The character's appearance is often compared to Grace Kelly.

Paula Tilbrook: Paula Tilbrook (born 16 January 1930 Salford) is a retired English actress who played Betty Eagleton in the ITV soap opera "Emmerdale" from 1994 to 2015.

January Jones: January Kristen Jones (born January 5, 1978) is an American actress and model, best known for portraying the role of Betty Draper in the television series "Mad Men" (2007–2015), which she received two Golden Globe nominations and one Emmy nomination.

Megan Henning: Megan Henning is an American actress.  She is known for playing Meredith Davies on "7th Heaven" and Monica Shaw on David E. Kelley's "The Brotherhood of Poland, New Hampshire".  In 2008, she began playing the recurring role of Judy Hofstadt, Betty Draper's compassionate sister-in-law, on "Mad Men".

Christopher Stanley: Christopher Stanley (born December 1965) is an American film and television actor, best known for his role as the politician Henry Francis, the second husband of Betty Francis played by January Jones on "Mad Men".  After a recurring role in the third and fourth seasons, he is a main cast member in the fifth, sixth and seventh seasons.  He appeared in the Ben Affleck-directed film "Argo".

Marcia Mitzman Gaven: Marcia Mitzman Gaven (born February 28, 1959) is an award-winning American actress from New York.  Since studying at the High School of Performing Arts and the State University of New York at Purchase, she has appeared in many musicals during her career singing in both mezzo-soprano and soprano roles.  Her Broadway debut came in 1979 when she played Betty Rizzo in "Grease", serving as the replacement for the original actress of the role.  In the 1980s she appeared in the musicals "The Rocky Horror Show", "Oliver! ", "Zorba", "Nine", "Anything Goes", "Chess", and "Welcome to the Club", and in the operas "Brigadoon", "South Pacific", and "".

Jon Hamm: Jonathan Daniel Hamm (born March 10, 1971) is an American actor, director, and television producer best known for playing advertising executive Don Draper for the AMC television drama series, "Mad Men" (2007–2015).

Wendy Benson: Wendy Benson-Landes (born July 8, 1971) is an American actress seen in many television shows.  She played the role of Julie Harris in the 2001 biographical television movie "James Dean".  She guest starred in many television series, including "Murder, She Wrote", "The X-Files", "Charmed", "JAG", "Ugly Betty", "According to Jim", "Ghost Whisperer", "", "Desperate Housewives" and "Mad Men".

John Slattery: John M. Slattery Jr. (born August 13, 1962) is an American actor and director.  He is best known for his role as Roger Sterling in the AMC drama series "Mad Men" and for his role as Howard Stark in cameo appearances in the Marvel Cinematic Universe films "Iron Man 2", "Ant-Man", and "".  He has received four Primetime Emmy Awards nominations and two Critics' Choice Television Awards for "Mad Men".  He was also part of the "Mad Men" ensemble cast that won two SAG Awards.

Supporting paragraphs: Public Relations (Mad Men) Jon Hamm
Answer: 1971