Marcus Mumford relies on coffee and nicotine since giving up alcohol almost seven years ago

During an appearance on the Armchair Expert with Dax Shepard podcast, the musician was asked if he's a "nicotine head" and he replied: "Yeah, it's my last remaining vice other than pride and general c***yness. Nicorette [gum] is my last one ... There's nothing wrong with it. My doctor was like: 'Have at it, bud' ... "

He added: "I get a buzz from my first coffee and I've taken coffee much more seriously since I stopped drinking ... 2018-19, seven years ... [I was] about 31, I don't actually know. I think it as 2019 ... where are we now, 2026, so that's six and a half years. I'm 38 [now]."

Marcus went on to talk about his upcoming 40th birthday, saying : "Coming into our prime ... I feel fantastic. I do. Occupying that space between our kids and our parents is kind of a nice place to be figuring stuff out in ...

"I feel like [there's been] a slight shift in authority. I feel like it's time to know what I think whereas before you could kind of rely on opinions of your elders a little bit ... I didn't have the answers for a while. I had lots of questions."

However, Marcus revealed his actress wife Carey Mulligan struggles to remember how old he is and actually got his age wrong on his last birthday card - and the musician had to use a calculator to prove his real age to her.

He explained: "My wife and I are so equally bad at maths that on my last birthday she wrote my birthday card and she said: 'Happy 39th birthday' and it took me a full three hours before I went next door with my calculator with the year minus the year I was born, which I thought was a pretty clever way to calculate it, and it turns out I was 38.

"And so actually for my birthday, she got me an extra year."