It looks like Johnny Depp and Amber Heard are becoming more public with their relationship and embracing their lives as an engaged couple.

"The Rum Diary" pair was spotted at a post-Grammys party hosted by Paul McCartney and Dave Grohl on Sunday, January 26th having a great time.

According to Us Weekly, the 50-year-old actor and musician brought his 27-year-old girlfriend turned fiancé to the bash that took place at a downtown Los Angeles Italian restaurant.

Other famous faces of rock that attended the celebration included the likes of McCartney's Beatles band mate Ringo Starr, Fleetwood Mac's Lindsey Buckingham, the Eagles' Joe Walsh and Thirty Seconds to Mars' Jared Leo.

However, eyes seemed to be on Johnny Depp and Amber Heard as the two have yet to publically confirm their engagement.

A source revealed, "The two of them looked so happy together," adding, "They walked in holding hands and [Depp] led her through the restaurant."

During their fancy meal the group ate from a special vegetarian menu that was specially created for McCartney and his wife Nancy Shevell.

An insider said, "They talked to them all evening," adding, "They ate and drank with Paul until he was ready to leave, and the foursome left together."

Following the dinner party, the "Into the Woods" actor took the stage for a charity concert at Servite Catholic School in Anaheim, California.

Some may be unaware that Depp is a skilled musician who has played with Keith Richards from The Rolling Stones.

Speaking of talented musicians, McCartney and Nirvana's Grohl, Krist Novoselic and Pat Smear won the Best Rock Song for "Cut Me Some Slack" at the 2014 Grammys Awards. Following the acceptance speech, McCartney confessed to reporters that his good friend Johnny Depp actually inspired the hit song.

He said, "I blame Johnny Depp because he had just given me this little cigar box guitar that I was widely excited to play," adding, "It was magic for me to play with these guys. I didn't know who they were. I found myself in the middle of a Nirvana reunion and I was very happy."

For photos of Amber Heard flaunting her engagement ring from Johnny Depp click HERE.