Fast Facts

  • Began acting at age 7 when she played Mary in a nativity play.
  • Waited tables at the Toronto Second City Theatre Company in 1973; joined the troupe in 1974 and quickly replaced Gilda Radner as a regular when Radner left for SNL.
  • Became one of the founding members of the sketch-comedy series SCTV in 1976.
  • Won a Genie Award for her work in the film The Life Before This (1999).
  • Earned an American Comedy Award in 2001 for Funniest Supporting Actress in a Motion Picture for her role in the 2000 mockumentary Best in Show; has appeared in three other Christopher Guest films (Waiting for Guffman, A Mighty Wind and For Your Consideration).
  • Was inducted into Canada's Walk of Fame in Toronto in 2007.
  • Spoke at the closing ceremonies of the Vancouver 2010 Winter Olympics.
  • Is a singer-songwriter and performed with the group Northern Lights on the song "Tears Are Not Enough" from the 1985 album We Are the World.


  • 2010, Emmy — Outstanding Supporting Actress in a Miniseries or a Movie: Nominee
  • 2004, Critics' Choice Awards — Best Acting Ensemble: Nominee
  • 1999, Genie Awards — Best Performance by an Actress in a Supporting Role: Winner
  • 2010, Screen Actors Guild Awards — Outstanding Performance by a Female Actor in a Television Movie or Miniseries: Nominee
  • 2007, Critics' Choice Awards — Best Supporting Actress: Nominee
  • 1982, Emmy — Outstanding Writing in a Variety or Music Program: Winner
  • 2007, Independent Spirit Awards — Best Female Lead: Nominee
  • 1983, Emmy — Outstanding Writing in a Variety or Music Program: Nominee
  • 1982, Emmy — Outstanding Writing in a Variety or Music Program: Nominee


  • Patsy — Sister
  • Maureen — Sister
  • Marcus — Brother
  • Dylan — Son
  • Mary Margaret O'Hara — Sister
  • Matthew — Son
  • Bo Welch — Husband

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  • Birth Name: Catherine Anne O'Hara
  • Birth Place: Toronto, Ontario, Canada
  • Profession: Actor, Director, Writer, Comedian

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