Johnny Depp was spotted out with girlfriend Amber Heard at the Hollywood Forever Cemetery for the ninth annual tribute to Johnny Ramone on Sunday.

"The Rum Diary" stars held hands as they made their way through the crowd and mingled with rock legends.

According to the Daily Mail, Heard, who is only 27-years old compared to her boyfriend who is 23 years her senior, probably had no clue about the rock history she was viewing but seemed to enjoy herself with her beau close by her side.

The blonde "Paranoia" actress wore an army green jacket with a loose white top, paired with flowy bottoms.

Meanwhile, Depp was in full rock mode, wearing a worn and faded brown leather jacket with destroyed blue denim, paired with a striped button down and blue opaque sunglasses.

For the event, the "Pirates of the Caribbean" actor took part in a Q&A session alongside "Cry-Baby" co-star Ricki Lake, Traci Lords and director John Waters.

Other celebrities who also attended the tribute included Dita Von Teese and Linda Ramone, Johnny's widow.

The Ramones guitarist died in 2004 at 55-years-old, following his split from the band in 1996. The Hollywood Forever Cemetery has made an 8-foot bronze statue of the punk icon to immortalize him in rock's history. The cemetery holds an annual tribute event to let fans spend an evening in remembrance of the legend, according to the Daily Mail.

To check out photos of Johnny Depp and Amber holding hands along with the other stars who attended the Hollywood Forever Cemetery for the ninth annual tribute to Johnny Ramone click HERE.