Ryan Reynolds turns 36 years old today, which means that the "Green Lantern" actor has had nearly two decades in the biz -- and 20 years' experience mingling with the Hollywood elite. Which might explain why this Canadian funnyman has had such a string of high-profile relationships.

Here, we look back at Reynolds' biggest relationships in photos, from Rachael Leigh Cook to Blake Lively, whom he quietly married in early September after one year of dating.

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  • Rachael Leigh Cook

    Ryan Reynolds and the '90s teen movie princess dated in the early 2000s.

  • Alanis Morissette

    The Canadian couple dated from 2002-2007. They became engaged in 2004.

  • Alanis Morissette

  • Alanis Morissette

  • Alanis Morissette

  • Alanis Morissette

  • Alanis Morissette

  • Scarlett Johansson

    Ryan Reynold and Scarlett Johansson wed in 2008 but split just two years later, in late 2010.

  • Scarlett Johansson

  • Scarlett Johansson

  • Blake Lively

    Surprise! After surreptitiously dating for the past year -- lots of trains and pillowcases -- Ryan Reynolds wed his "Green Lantern" co-star in a secret ceremony in South Carolina in early September.

  • Blake Lively

  • Blake Lively

  • Blake Lively

  • Blake Lively

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