Oh, so prettiful!

Hilary Swank was sparklelicious at the Vienna Opera House Ball in Austria on Thursday.

The actress looked very high-society in a nude Elie Saab Couture gown featuring sheer long sleeves and dozens of glittering crystals running the entire length of the dress.

With her hair in a simple updo and wearing natural, earth-toned makeup, Hilary was quite literally the belle of the ball and we bet she had a fantabulous time!

Beyond haute!

[Image via Rex Features/AP Images.]