Hilary Duff was spotted getting friendly with Penn Badgley on the set of Gossip Girl in New York City yesterday afternoon.

As we reported last month, Hilary will guest star as Olivia Burke, a movie starlet who enrolls at NYU and rooms with Vanessa (Jessica Szohr).

We wonder what kind of trouble the Duffster will cause in the sexy series? We can’t wait!

For now, check out the new pics of Hilary on the set of Gossip Girl and voice your predictions for her character in the comments section!

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Hilary Duff - Hilary Duff Wallpaper (20543190) - Fanpop

Hilary Duff - Hilary Duff Wallpaper (20543450) - Fanpop

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Hilary Duff - Hilary Duff's Dog Undergoes Brain Surgery
Hilary Duff's dog is ''doing great'' after undergoing surgery to drain fluid from her brain. Hilary Duff's dog is "doing great" after undergoing brain surgery. The 24-year-old actress - who is expecting her first child with husband Mike Comrie - was upset ...