Michael Buckner/Getty
February 29, 2012 06:00 AM

She may not have been photographed sporting it yet yet, but Jessica Biel was showing off her sparkly engagement ring on the patio at West Hollywood’s Chateau Marmont while hanging out with a friend.

According to an onlooker, the sparkler was glittering in the sunlight – and it was a large, round rock. The actress was dressed comfortably in a gray blazer, black shorts and a rose-colored blouse. Biel sipped on a coffee and chatted up her friend – a bearded guy in a red plaid shirt and black-framed glasses.

Says the onlooker: “She looked really lovely, polished, calm and happy.”

The two enjoyed each other’s company for over an hour, never leaving their table and mostly keeping to themselves.

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