Reddish hues are thought to be a fashion favourite of Letizia's, as she has donned this colour on many occasions.
The simple yet sophisticated gown is one of the Queen's wardrobe staples, having worn it four times over the years.
The former journalist kept her makeup to a minimum with a pink glitzy shadow dusted over her eyelid, warm bronzer to accentuate her cheekbones and a sparkly gloss on her lips.
Letizia, who is known for her love of film, visited the town's Moncayo cinema, accompanied by the President of Navarra, María Chivite and Opera Prima Festival director Luis Alegre.
Letizia beamed as she greeted crowds who wanted to take pictures and videos of the Queen and seemed delighted about her presence.