Jessica Biel Shows Off a Sparkling Engagement Ring at Chateau Marmont
02/29/2012 AT 06:00 AM EST
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.