As one of the greatest actresses of all time (yep, we said it), Meryl Streep is a magical on-screen chameleon, transforming into characters as different as Miranda Priestly and Julia Childs with utter effortlessness.

But there is some behind-the-scenes effort involved... on the part of the costume designers, at least. The age-old saying "the clothes make the (wo)man" was never truer when Meryl slipped into Maggie Thatcher's skirt suits, Senator Shaw's power blazers or, yes, Miranda Priestley's luxe Prada duds. And Meryl owned every single look.

So to celebrate Streep's 63rd birthday today, we're taking a look back at the actress' most memorable on-screen looks. Which is your favorite? Vote in the slideshow below.

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  • The Deer Hunter (1978)

    <a href="http://www.huffingtonpost.com/2010/05/18/meryl-streep-barnard-grad_n_580335.html" target="_hplink">Meryl has described her character </a> as "a lovely, quiet, hapless girl... just behaving in a way that cowed girls, submissive girls, beaten-up girls with very few ways out have behaved forever and still do in many worlds." Her frilly, non-threatening dresses bear that out perfectly.

  • Manhattan (1979)

    As Woody Allen's lesbian ex-wife, Meryl killed it in loose, I-don't-give-a-crap oxford shirts and skirts. Oh, and that long, loose 70s-tastic hair.

  • Kramer vs. Kramer (1979)

    Playing the wife who ditches her husband to "find herself," Meryl embodied a strong yet low-key glamour that was the 70s' trademark.

  • The Bridges Of Madison County (1995)

    Set in Madison County, Iowa, "The Bridges Of Madison County" found Meryl in country floral prints, button-downs, flats... and those blunt bangs.

  • The Manchurian Candidate (2004)

    Meryl got down to business with short hair and power blazers to play the ruthless Senator Eleanor Prentiss Shaw.

  • The Devil Wears Prada (2006)

    In the most fashionable part she (or possibly <em>anyone</em>) has ever played, Meryl wowed in ladylike yet powerful designer gear, replete with luxe details rendered in dark, intimidating colors. Everything about Miranda Priestly looked expensive.

  • A Prairie Home Companion (2006)

    Her character name was Yolanda Johnson, but Meryl could have easily gone by the name Stevie Nicks (with an extra dose of country) in this fanciful film. We're sorta digging the poofy blonde bangs...

  • Mamma Mia! (2008)

    When we grow up, we want to be Meryl in "Mamma Mia!": the wild mermaid hair, loose overalls, airy tops and beat-up boat shoes made for the ultimate carefree island wardrobe.

  • Julie & Julia (2009)

    There were plenty of cardigans, pearls and ladylike a-line skirts when Meryl portrayed Julia Childs, known for her passionate love of fine French cuisine.

  • It's Complicated (2009)

    In this heartwarming if forgettable dramedy, Meryl proved that suburban moms can be chic, too. Plus her hair looked <em>awesome</em>.

  • The Iron Lady (2011)

    Meryl embodied Margaret Thatcher's no-nonsense look with boxy handbags, bow blouses and shapely skirt suits.

  • Moviefone - The Iron Lady - Meryl Streep Interview

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