Rachel McAdams (“Sherlock Holmes,” “Morning Glory,” “A Wanted Man”) was born in London, Ontario, Nov. 17, 1978. (Danny Moloshok / Invision/Associated Press)
Will Arnett (“Arrested Development,” “30 Rock,” “Despicable Me”) was born May 4, 1970, in Toronto. (Robyn Beck / AFP/Getty Images)
Ryan Reynolds (“Green Lantern,” “Buried,” “The Proposal”) was born Oct. 23, 1976, in Vancouver. (Carlos Alvarez / Getty Images)
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Ryan Gosling (“Drive,” “Gangster Squad”) was born in Rachel McAdams’ hometown of London, two years later: Nov. 12, 1980. (Andreas Rentz / Getty Images)
Filmmaker James Cameron (“Aliens,” “Titanic,” “Avatar”), pictured with Suzy Amis, was born Aug. 16, 1954 in Kapuskasing, Canada. (Marty Melville/ AFP/Getty Images)
Singer Avril Lavigne (“I’m With You,” “Complicated”) was born Sept. 27, 1984, in Belleville, Canada. (Alexander Tamargo / Getty Images)
Singer Alanis Morissette (“Jagged Little Pill,” “Ironic”) was born in Ottawa, June 1, 1974. She’s pictured in concert at England’s Manchester Apollo in 2012. (Shirlaine Forrest / WireImage)
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Ellen Page (“Juno,” “Inception”) was born Feb. 21, 1987, in Halifax, Canada. (Patrick T. Fallon / For the Los Angeles Times)
Michael J. Fox, with wife Tracy Pollan, was born June 9, 1961, in Edmonton, Canada. (Frederic J. Brown / AFP/Getty Images)
Comic film star Jim Carrey, left, with Ringo Starr at a January 2014 benefit in Los Angeles, was born Jan. 17, 1962, in Newmarket, Canada. (Kevin Winter / Getty Images)
Pamela Anderson (“Baywatch,” “V.I.P.”), at a January 2014 benefit in L.A., was born July 1, 1967, in Ladysmith, Canada. (Valerie Macon / Getty Images)
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William Shatner was born March 22, 1931, in Cote Saint-Luc, Canada. (Michael Reynolds / EPA)