Diane Kruger sparked engagement rumors after she was spotted wearing a big sparkler on her wedding finger.

The sighting took place when Kruger and her longtime boyfriend Joshua Jackson left a dinner party held for designer Antonio Berardi in Los Angeles, Calif. on Tuesday.

The 37-year-old German-born actress wore black leather-like pants with a striped white sweater and rocked a big ring on her left hand. Joshua, 35, who was right behind her, sported a grey sweater with dark jeans.

View the photos here.

This isn't the first time the couple, who has been dating since 2006, was said to be engaged. In 2013, they faced similar rumors, when Kruger was seen wearing another ring on that special finger. However, the former Dawson's Creek star shot down the rumors.

"No, we're not engaged," Jackson told ET Canada at the time. "I'm not sure in the modern world that that's the track that we're taking."

Kruger seems to be on the same page with Jackson, judging from what she said during a 2011 interview with Glamour magazine.

"Without sounding pessimistic, I learned that I don't believe in marriage," Kruger, whose first marriage to French actor Guillaume Canet ended in divorce, said. "I believe in a commitment that you make in your heart. There's no paper that will make you stay. A guy friend of mine said, and it made a lot of sense, that people should get married at the end of the road, not the beginning."