Paul McCartney is back with a new solo album, "The Boys of Dungeon Lane," and in doing the press rounds behind the release, he's opening up about the losses of Beatles bandmates John Lennon and George Harrison.

McCartney's new solo release takes inspiration from his childhood and the early days with the Beatles, and it even features a duet with Beatles drummer Ringo Starr on the song "Home to Us."

Speaking with The Guardian, McCartney talked about what gives him comfort in the absence of friends and fellow musicians Lennon and Harrison.

"My collaborator was probably one of the best writers of the century, so, yeah, you're going to miss him," he said in the interview. "But that's life. You lose people."

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He also remembered what Beatles producer George Martin said to him about aging.

"The terrible thing about it is all your mates start popping off," Martin said.

"Now I'm probably at that age, and I'm very conscious of that, having lost John and George – two big touchstones for anything we're talking about [in this interview]," he also said. "So, yeah, you do miss them."

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McCartney added: "I start to get very sad, and I have to think, 'Wow, wait a minute, everyone misses them.' It's not just me. So that makes me feel a bit better. I think, 'Well, sod it, it's life, and it's what we've got.'"

There's something special about how McCartney is connecting with his past on this new album, especially the track "Home to Us."

You can argue all day about whether Starr is an overrated drummer, but you can't deny that there was real chemistry between all of the Beatles' members. Having McCartney and Starr back together on this song really makes the album.