At the 2007 Academy Awards, Witherspoon showed off her sartorial prowess in a Nina Ricci gown.
At Elle's Women in Hollywood Event in Los Angeles, a well-fitting suit was all that was needed.
When she stepped out in this Zac Posen dress, Witherspoon looked completely different.
In a hot pink Stella McCartney gown, Witherspoon wowed the crowd at the Costume Institute Gala, where she was accompanied by the British designer.
Calvin Klein, the designer of Reese Witherspoon's gown at the 2015 Golden Globes, achieves understated glamour better than anybody else.
The Oscar de la Renta dress Witherspoon donned as evidence of her affinity for the colour purple.
For Tiffany & Co.'s annual star-studded Blue Book event, the actress wore a figure-hugging Brandon Maxwell gown.
The Big Little Lies candidate dazzled in a chevron Zac Posen off-the-shoulder gown at the SAG Awards in 2018.
Reese wore two different hues of green to a screening of The Morning Show, and we couldn't get enough of it.
The actress wore a Roland Mouret gown and Tiffany & Co. jewellery to the 77th Annual Golden Globe Awards, and she looked stunning in both.