Sarah Hyland: Birthday At The Bank!

Sarah Hyland shows off her pink birthday cake as she celebrates at The Bank nightclub inside the Bellagio Hotel and Casino on Saturday night (December 10) in Las Vegas.

The 21-year-old Modern Family starlet partied with friends at the club, including boyfriend Matt Prokop.

PHOTOS: Check out the latest pics of Sarah Hyland

To celebrate her 21st, Sarah wore a super chic Chagoury Couture dress with Simon G jewelry and Giuseppe Zanotti heels. So cute!

15+ pics inside of Sarah Hyland celebrating at the Bank…