Hollywood star Julia Roberts has been named as the new face of Givenchy's Spring 2015 campaign, and for anyone wondering why the 47-year-old actor was given the modelling gig, the fashion brand's creative director Riccardo Tisci thinks she "represents such a mature woman."

While speaking with Yahoo Style about his decision to make Roberts the face of the campaign, Tisci explained, "A lot of people see Givenchy as only 'haute couture,' or only 'street and urban. For me, Julia is many things. She has this strength as an actress, but she's also this beautiful American woman. She's a big star, but she's not a paparazzi or a blog monster. It's going to be my tenth year at Givenchy in March, so I wanted to represent the woman who is more mature, beautiful, talented, but also unpretentious. "

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Roberts was rather shocked to be offered the role at first, and even joked with her sister about becoming a fashion model later in life. "She goes, 'How are you suddenly turned into a supermodel, you're almost 50,'" Roberts recalled. "It's funny!"

In her first campaign shots, which are black and white, the 'Pretty Women' actress sports a stylish, yet simple, tuxedo.

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When speaking about the shots, Roberts said, "Well, it's impossible for me to be totally objective and not make four or seven jokes right now. I wish I looked like that! If you could see me right now, you'd be laughing so hard. I think they're very cool images and I think all the clothes would have been things I would have chosen for myself."