The Desperate Housewives star revealed her new figurine - which was crafted in honour of National Hispanic Heritage Month - at a ceremony held at her own Eve nightclub in the city last night.
The waxwork depicts Longoria wearing the floor-length red Carolina Herrera ballroom gown that she wore to the Alma Awards 2008 and sporting long, dark wavy hair.
Longoria - who was dressed in a similar outfit for the unveiling - later posted a picture of herself on Twitter posing next to the model alongside the message: "Can you tell which one is really me?" She also posted a photograph of her husband Tony Parker standing between herself and the waxwork, joking: "Tony must choose!"
Rosita Chapman, the general manager of Madame Tussauds Las Vegas, added that they were "thrilled" to add Longoria's statue to their waxwork collection, describing her as a "beloved performer, philanthropist and spokesperson" and "an outstanding role model to many, especially within the Hispanic charitable community".
Among the other waxworks on display at Madame Tussauds Las Vegas are President Barack Obama, Gwen Stefani and Snoop Dogg.
