A spaghetti strap moment at the 1999 Primetime Emmy Awards.
Donning a grey pantsuit at the GLAAD Media Awards in 2000.
Short and sweet at the now defunct Blockbuster Entertainment Awards, 2000.
Flip-flops as formalwear at the Seventh Annual Women in Film Lucy Awards in 2000.
Celebrating Dawson’s Creek's 100th episode in 2002
Embracing the feminine side of things at the 2005 Brokeback Mountain premiere.
Debuting bangs and a dark ensemble in 2006.
A frilled mini-dress at the 2006 Whitney Gala.
Gorgeous in marigold Vera Wang at the 2006 Academy Awards.
Short and sparkly for the 2007 Film Independent’s Spirit Awards.
At the New York Film Festival in 2008.
Attending the Salute to American Heroes in 2008.
Continuing her streak of short, white dresses at a 2010 screening of Blue Valentine.
Channeling Marilyn at the My Week with Marilyn premiere.
Going golden at the 2011 AFI Fest.
A plunging look at the 2011 New York Film Festival.
Trading in Blue Valentine for blue velvet at the Golden Globe Awards in 2012.
At the Ireland Alliance Oscar Wilde Pre-Academy Awards Event, Williams opted for a mod-inspired LBD.
Embracing spring at the 2012 Tribeca Film Festival.
At a Take This Waltz screening, the actress opted for a lace-up LBD.
Embracing the quirk of Comic-Con in a printed frock.
Another chic LBD at the 2013 Whitney Gala.
For the 2013 Oz: The Great and Powerful premiere, a strapless peacock blue dress.
Going punk at the 2013 Costume Institute Gala.
Wearing Louis Vuitton to the Cabaret opening night on Broadway.
With Nicolas Ghesquiere at the Foundation Louis Vuitton Opening in 2014.
In Louis Vuitton, once again, at the ‘Charles James: Beyond Fashion’ Costume Institute Gala in 2014,
Sequins and combat boots at the Suite Francaise Paris Premiere in 2015.
Attending the Louis Vuitton show during Paris Fashion week.
For the InStyle Awards in 2015, Williams wore a tough leather look.
Attending the Louis Vuitton Series 3 VIP Launch in 2015.
At the Louis Vuitton Cruise 2016 Show
Williams wears a gilded black dress at the New York Film Critics Circle Awards.
Wearing yellow Louis Vuitton at the 32nd Santa Barbara International Film Festival.
Williams paired a lace Louis Vuitton gown with a thin ribbon choker at the 74th Annual Golden Globe Awards.