Looking back at Marc Jacobs 's catwalk shows, it's not hard to see how much he enjoys taking risks and changing things up. No two collections are ever the same — and whether it's through the use of exaggerated layers, futuristic shapes, nostalgic undertones, or feminine silhouettes, he always delivers an array of fresh, covetable pieces.
We can trace Marc's chameleon tendencies with just a glance at his two-plus decades' worth of design, high-profile accolades, and side projects (read: Louis Vuitton). It's a wonder this man ever sleeps. Click through to see some of his most memorable looks and why there's no stopping today's birthday boy.
— Additional reporting by Randy Miller
Spring '03 was all about retro glamour.
Marc went mod for Autumn '03.
Spring '04 was full of relaxed, tailored pieces.
Marc showed polished, secretary-chic looks for Autumn '04.
Bold brights and swingy coats marked the Spring '05 collection.
Autumn 2005's collection was full of moody hues and lots of volume.
Marc featured glitzy party dresses and relaxed glamour for Spring '06.
The Autumn '06 collection showcased chunky knits.
Marc paired metallics and pastels for Spring '07.
Billowing silk dresses punctuated the light feel of the collection.
For Autumn '07, the collection took a grown-up, European turn.
Marc showed A-line silk dresses with tights and chic cloche hats.
Marc went surreal for Spring '08 with off-kilter gauzy pieces.
Sheer panels were inserted into evening dresses.
Marc showed gilded separates and space-age headwear for Autumn '08.
The collection took an avant-garde, futuristic spin.
The Spring '09 collection was part Mary Poppins, part Parisian chic.
Straw hats and lurex obi belts accessorized each look.
Exaggerated shoulders and splashy prints were the focus of Autumn '09.
The collection was all about the rocker-chic silhouette.
Spring '10 took a Kabuki-inspired twist . . .
And the huge ruffles definitely made a statement.
Huge Mongolian-fur collars and velvet trousers gave the collection a luxe feel . . .
And voluminous printed gowns felt strong and romantic.
Marc's 2011 collection channeled '70s chic.
The pieces were reminiscent of Studio 54-era disco queens.
For Autumn, Marc showed us playful shapes and lots of polka dots.
The Autumn '11 collection was full of '40s-era silhouettes.
The juxtaposition of '90s grunge plaid against a delicate sheer fabric made for a seriously cool frock.
We love the feel of this '20 glam flapper look — the deep front V and asymmetrical hem remind us of The Great Gatsby.
To keep even the most luxurious of fabrics a little funky, the designer manipulated the materials to gather in surprising places.
Tiered cellophane pencil skirts made a strong appearance on the Spring '12 runway.
While at first glance an ultraretro look, we like how Marc updated the girlie set with superembellished fabrics and metallic accents.
Marc Jacobs  focused on silver metallic pieces for Spring '12.
Are you a fan of the PVC-infused cowgirl booties?
Sheer gingham paired with slick leather skirts created a hardened Western vibe.
We love this ladylike look with a sexy twist.
Elaborate hats by milliner Stephen Jones echoed the fanciful essence of the Autumn collection.
Rich jewel shades and intricate details lit up the runway.
Big, bold stripes dominated the Spring '13 show.
Marc Jacobs  showed a modern take on the skirtsuit.
Short shorts featured in the Spring '13 runway.
The slinky lingerie-inspired collection paired sultry metallic lamé with miles of fur.
Iridescent sheen took the daywear shirtdress to night.
In one of the collection's most iconic looks, clothing was barely the highlight when model Lily McMenamy stomped the runway topless.
Models stomped down a wasteland-inspired runway littered with cigarette butts and shards.
The name of the game was overembellishment, and tassels, epaulettes, and embroidery adorned the layered designs.
The gowns embraced the theme of excess, with rich floral motifs enhancing the eveningwear.
Airy, cloud-like floral appliqués mimicked the heavenly setting of the designer's show.
Pastel ombré embraced the airy effect of Marc's plush fur outerwear.
The collection also sparkled with an exuberance that could only come with head-to-toe crystals.