'Glee's Dianna Agron And Alex Pettyfer Engaged

The Glee cast better start practicing wedding tunes!

Dianna Agron, who plays Quinn Fabray on the hit FOX show, is engaged to her I Am Number One co-star, British actor Alex Pettyfer, according to Us Magazine.

The couple, who were set up by director D.J. Caruso less than a year ago, have gushed about each other in public recently. "[Agron] is an amazing woman, and she's got this old school, classic movie-star elegance to her," Pettyfer said on The Ellen DeGeneres Show last week. "I'm just very happy in my personal life."

Agron said to Sugar Magazine, "Alex might see himself as a bad boy, but he's actually very sweet in real life. It's important to have your differences in any relationship. I wouldn't want to be dating a carbon copy of myself. That would just be boring."

I Am Number One opens in theaters February 18. —ISHITA SINGH