Scarlett Johansson - Teen Choice Awards 2008

Newly engaged actress Scarlett Johansson works out a Matthew Williamson chiffon dress at the 2008 Teen Choice Awards at Gibson Amphitheater on Sunday, August 3, 2008 in Los Angeles, California.

Scarlett, 23, finished off her look with Jimmy Choo “Gloss” purple eel platforms and jewels by Sonia Boyajian, who also designed her engagement ring.

Back in May, Ms. Johansson confirmed her engagement to actor Ryan Reynolds, 31. And now she’s proudly wearing her blingin’ ring!!!! Congrats to the two of them.

The 2008 Teen Choice Awards is scheduled to air on Monday @ 8PM ET/PT on FOX.

10+ pictures inside of Scarlett Johansson @ the 2008 Teen Choice Awards…