Lily Allen has revealed that she became addicted to the prescription drug Adderall to lose weight while supporting Miley Cyrus on tour and contemplated taking heroin.

Speaking to DJ Fat Tony on his The Recovery podcast, the 35-year-old singer also admitted that she ran out of money and had to go back on the road.

She supported US pop star Cyrus during her 2014 Bangerz tour, and conceded that it was at this time that she realised she had hit rock bottom.

She said: "I got married when I was 24 (to Sam Cooper) and then I had a baby, I had a baby who died 10 years ago this month (son William), and then I went on to have two successful pregnancies and I had my babies, but six months after my youngest was born we sort of ran out of money and I had to go out on the road again.

Miley Cyrus

"But I was like 14st and just did not feel like a pop star at all so I started taking this drug called Adderall, which is like speed, to lose the weight, and I got addicted to this drug because it made me invincible and I could work really long hours and be all the people I was required to be.

"And then I ended up on tour in America supporting Miley Cyrus.

"It was when she was doing Wrecking Ball and the Bangerz tour and it was a highly sexualised tour. I had just spent the last three years pushing babies out. It couldn't have been less what I felt like.

"I had never supported anyone so I was re-entering this phase of being a pop star again but not doing it on my terms any more.

"I was supporting this girl who was much younger and more attractive than I felt and I just started acting out in all manner of ways.

"I started cheating on my husband and I had always really drunk alcohol to take the edge off of the drugs, and then I realised I was getting up in the morning and downing those mini bottles of vodka or whisky or whatever was left, without the drugs any more.

"I was thinking, 'I think I have got a drinking problem'. I remember being in LA and thinking, 'None of this acting out is working any more. Maybe I should try heroin'.

Lily Allen and Sam Cooper on their wedding day

"But . . . I had been in a scene where I had seen what happens to people who use heroin, and knew that when that thought popped into my head it was time to confront my demons, and that was about five years ago. And I started recovery."

Allen said she started using online addiction recovery tool The Rooms, but added: "I got clean and at that time I wasn't really committed to the programme as a lifelong thing. I just wanted to get to six months so at least I know I can stop this when I need to.

"At six months I started drinking again and almost instantly I lost everything. I lost my marriage, I lost my house that I had worked for 10 years to buy.

"My career started sinking and I lost all my friends, I didn't have any of my friendships any more.

"I was so resentful and so angry all the time, I really felt that the world owed me stuff and I got the raw end of the deal. And that went on for another four years and then I ended up back in The Rooms again."