Amber Heard has been spotted with a ring on her engagement finger.

The 27-year-old actress could be set to marry Johnny Depp after she was seen with what looked like a huge diamond on the ring finger of her left hand as she entered a Los Angeles restaurant on Monday.

According to E! News, Amber and another woman dined at Ago, and as she left the London Fields star did everything she could to shield her left hand from photographers. She even waited for a valet driver to open her car door so she didn't have to show her ring finger.

Amber and Johnny first met when they starred together in 2011's The Rum Diary but didn't get together until 2012 after the breakdown of his 14 year relationship with Vanessa Paradis, with whom he has Lily Rose,14, and Jack, 11.

Johnny, 50, and bisexual Amber's relationship has not always been smooth, and she initially ended their romance after deciding she wanted to be single. However, Johnny was undeterred and sent her a personally-penned poem and a bouquet of roses every day for a month to convince her to give him another chance. "Johnny didn't give up - he missed her so much over the summer. They both love literature and the way he tried to win her back totally worked. Once they flew for a romantic break [in the Bahamas], they were back on as a couple. Johnny's the type to fall hard and he's vowed not to let a girl like Amber, who's beautiful and intelligent, slip through his fingers," a source said in late 2012.

Johnny is also said to have named a beach on his private island, Little Hall's Pond, in honor of his girlfriend, calling it Amber's Cove.