media_removed_toofab 102011

Angelina Jolie
stepped out for the first time since announcing her engagement yesterday -- where her smile was almost as big as her ring!

The actress was spotted at the Roosevelt Hotel, where she had a huge grin across her face as she waved to photographers and fans while leaving.

And Jolie didn't even try to hide her new diamond sparkler, which Brad Pitt took over a year to design with jeweler Robert Procop.

The two have not set a date yet, and according to Brad's rep the engagement was a "promise for the future."

Check out more shots of Jolie (and that giant ring!) above.

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