Reese Witherspoon: Surprise Sex Bomb?

Reese Witherspoon's recent appearance on our list of the sexiest dresses from this year's Oscars had us thinking . . . is she a secret siren? America's sweetheart has certainly had some sultry looks along the way, starting with some dresses way back in the mid-'90s. Instead of charting all of her red carpet glamour, we're zeroing in on the most sizzle-worthy dresses of all.

Getty | S. Granitz

A young Reese Witherspoon was no stranger to the slinky LBD — complete with knee-high boots — at The House of Yes premiere in 1997.

Getty | Jeff Kravitz

Pink and a tulle-infused fishtail hem did not deter us from noticing just how sexy the low-cut neckline of Reese's pink dress was at the Legally Blonde premiere in 2001.

Getty | S. Granitz

In 1996, Reese Witherspoon was not afraid to show off a little skin, thanks to this midriff-baring ensemble at The People vs. Larry Flynt premiere.

Getty | Gregg DeGuire

For the 2002 Golden Globe Awards, Reese chose an eggplant-colored slipdress for the red carpet, and her choice totally reminded us of something altogether boudoir-inspired.

Getty | KMazur

The bright orange hue of this mid-length dress showed off an ample amount of décolletage at the NYC premiere of Vanity Fair in 2004.

Getty | M. Caulfield

Reese wore this black lacy number to the Critics' Choice Awards in 2006.

Getty | Donato Sardella

Reese chose a sexy lace Jason Wu dress to a cancer research benefit in 2010.

Getty | John Shearer

For the LA premiere of How Do You Know in December 2010, Reese looked ultrasexy in a strapless Zac Posen dress.

Getty | Jason Kempin

For the 10th anniversary Avon Foundation For Women Gala in October 2010, Reese went glam in a formfitting Jason Wu bustier dress.

Getty | Dominique Charriau

Reese sizzled in a red asymmetrical dress and peep-toe heels at the Paris premiere of Water For Elephants.

Getty | Eamonn McCormack

Jaws dropped when Reese showed up to the London premiere of Water For Elephants in 2011. How'd she do it? She wore a sexy, stunning cobalt-blue dress by Stella McCartney.

Getty | Don Arnold

Reese continued her Water For Elephants press tour in this stunning strapless Zac Posen dress that screamed "va va voom."

Getty | Steve Granitz

Reese looked fierce in a leopard-print Zac Posen mini at the MTV Movie Awards in 2011.

Getty | Jordan Strauss

The actress tapped into her futuristic side in a black cutout Cushnie et Ochs dress in 2011.

Getty | Jeff Vespa

For the 2012 Golden Globes, Reese played the lady in red in a gorgeous crimson-hued fishtail gown by Zac Posen.

Getty | Jordan Strauss

Reese looked sexy and sassy in a beaded Miu Miu dress for the This Means War Los Angeles premiere in 2012.

Getty | Jennifer Graylock

Reese Witherspoon stepped out postarrest at the NYC premiere of Mud in a leg-baring LBD by Saint Laurent. While the minidress featured an embellished neckline, she kept everything else simple, pairing the look with black pumps and a Saint Laurent clutch.

Getty | Alberto E. Rodriguez

Reese Witherspoon donned the sexiest kind of LBD — one with a sweetheart neckline and embellishments — to Benjamin Millepied's LA Dance Project inauguration benefit gala in LA in June 2013.

Getty | Jason LaVeris

For a Chanel party in early 2014, she picked black skinnies and a lacy top that showed some skin through the thin fabric.

Getty | Jon Kopaloff

In what might be her most daring look yet, Reese picked a black dress with a fairly skimpy top half for 2014's Vanity Fair Oscars party.